loplugin:passstuffbyref

Change-Id: I336fd329b577b6fa141265d8bc7ce67784bd7306
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/133210
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>

98 files changed, 101 insertions, 101 deletions

diff --git a/accessibility/source/standard/vclxaccessibletoolbox.cxx b/accessibility/source/standard/vclxaccessibletoolbox.cxx
index 50a600e3cbef..4e2059b61280 100644
--- a/accessibility/source/standard/vclxaccessibletoolbox.cxx
+++ b/accessibility/source/standard/vclxaccessibletoolbox.cxx
@@ -94,7 +94,7 @@ namespace
         sal_Int32    getIndexInParent() const                    { return m_nIndexInParent; }
         void         setIndexInParent( sal_Int32 _nNewIndex )    { m_nIndexInParent = _nNewIndex; }
 
-        static Sequence< sal_Int8 > getUnoTunnelId();
+        static const Sequence< sal_Int8 > & getUnoTunnelId();
 
     public:
         OToolBoxWindowItem(sal_Int32 _nIndexInParent,
@@ -132,7 +132,7 @@ namespace
         return new OToolBoxWindowItemContext( m_nIndexInParent, getComponentContext(), _rxInnerContext, this, getParent() );
     }
 
-    Sequence< sal_Int8 > OToolBoxWindowItem::getUnoTunnelId()
+    const Sequence< sal_Int8 > & OToolBoxWindowItem::getUnoTunnelId()
     {
         static const comphelper::UnoIdInit implId;
         return implId.getSeq();
diff --git a/chart2/source/inc/BaseCoordinateSystem.hxx b/chart2/source/inc/BaseCoordinateSystem.hxx
index afb02c07f1f4..85739dc11a3a 100644
--- a/chart2/source/inc/BaseCoordinateSystem.hxx
+++ b/chart2/source/inc/BaseCoordinateSystem.hxx
@@ -98,7 +98,7 @@ public:
         const css::uno::Reference< css::util::XModifyListener >& aListener ) override;
 
     void setAxisByDimension( sal_Int32 nDimension, const rtl::Reference< ::chart::Axis >& xAxis, sal_Int32 nIndex );
-    rtl::Reference< ::chart::Axis > getAxisByDimension2(sal_Int32 nDimension, sal_Int32 nIndex ) const;
+    const rtl::Reference< ::chart::Axis > & getAxisByDimension2(sal_Int32 nDimension, sal_Int32 nIndex ) const;
 
     void setChartTypes( const std::vector< rtl::Reference< ::chart::ChartType > >& aChartTypes );
     const std::vector< rtl::Reference<::chart::ChartType > > & getChartTypes2() const { return m_aChartTypes; }
diff --git a/chart2/source/model/main/BaseCoordinateSystem.cxx b/chart2/source/model/main/BaseCoordinateSystem.cxx
index 52ef7ffde0d7..95faaed01bfd 100644
--- a/chart2/source/model/main/BaseCoordinateSystem.cxx
+++ b/chart2/source/model/main/BaseCoordinateSystem.cxx
@@ -256,7 +256,7 @@ Reference< chart2::XAxis > SAL_CALL BaseCoordinateSystem::getAxisByDimension(
     return m_aAllAxis[ nDimensionIndex ][nAxisIndex];
 }
 
-rtl::Reference< Axis > BaseCoordinateSystem::getAxisByDimension2(
+const rtl::Reference< Axis > & BaseCoordinateSystem::getAxisByDimension2(
             sal_Int32 nDimensionIndex, sal_Int32 nAxisIndex ) const
 {
     if( nDimensionIndex < 0 || nDimensionIndex >= m_nDimensionCount )
diff --git a/chart2/source/view/inc/VDataSeries.hxx b/chart2/source/view/inc/VDataSeries.hxx
index bfe85435cc02..089c4a1ae887 100644
--- a/chart2/source/view/inc/VDataSeries.hxx
+++ b/chart2/source/view/inc/VDataSeries.hxx
@@ -117,7 +117,7 @@ public:
 
     css::uno::Reference<css::beans::XPropertySet> getPropertiesOfPoint( sal_Int32 index ) const;
 
-    css::uno::Reference<css::beans::XPropertySet> getPropertiesOfSeries() const;
+    const css::uno::Reference<css::beans::XPropertySet> & getPropertiesOfSeries() const;
 
     css::chart2::Symbol* getSymbolProperties( sal_Int32 index ) const;
 
diff --git a/chart2/source/view/main/VDataSeries.cxx b/chart2/source/view/main/VDataSeries.cxx
index 9054899485f4..81b3758293fa 100644
--- a/chart2/source/view/main/VDataSeries.cxx
+++ b/chart2/source/view/main/VDataSeries.cxx
@@ -910,7 +910,7 @@ uno::Reference< beans::XPropertySet > VDataSeries::getPropertiesOfPoint( sal_Int
     return getPropertiesOfSeries();
 }
 
-uno::Reference<beans::XPropertySet> VDataSeries::getPropertiesOfSeries() const
+const uno::Reference<beans::XPropertySet> & VDataSeries::getPropertiesOfSeries() const
 {
     return m_xDataSeriesProps;
 }
diff --git a/comphelper/source/misc/accimplaccess.cxx b/comphelper/source/misc/accimplaccess.cxx
index 4c66d03ffd08..bcf05c926810 100644
--- a/comphelper/source/misc/accimplaccess.cxx
+++ b/comphelper/source/misc/accimplaccess.cxx
@@ -36,7 +36,7 @@ namespace comphelper
     {
     }
 
-    Sequence<sal_Int8> OAccessibleImplementationAccess::getUnoTunnelId()
+    const Sequence<sal_Int8> & OAccessibleImplementationAccess::getUnoTunnelId()
     {
         static const comphelper::UnoIdInit implID;
         return implID.getSeq();
diff --git a/connectivity/source/commontools/ConnectionWrapper.cxx b/connectivity/source/commontools/ConnectionWrapper.cxx
index 9ed4f394b5ee..df5ef04ee523 100644
--- a/connectivity/source/commontools/ConnectionWrapper.cxx
+++ b/connectivity/source/commontools/ConnectionWrapper.cxx
@@ -162,7 +162,7 @@ sal_Int64 SAL_CALL OConnectionWrapper::getSomething( const Sequence< sal_Int8 >&
 }
 
 
-Sequence< sal_Int8 > OConnectionWrapper::getUnoTunnelId()
+const Sequence< sal_Int8 > & OConnectionWrapper::getUnoTunnelId()
 {
     static const comphelper::UnoIdInit implId;
     return implId.getSeq();
diff --git a/connectivity/source/commontools/TConnection.cxx b/connectivity/source/commontools/TConnection.cxx
index 25997b512a3e..f35e8ca194ba 100644
--- a/connectivity/source/commontools/TConnection.cxx
+++ b/connectivity/source/commontools/TConnection.cxx
@@ -59,7 +59,7 @@ sal_Int64 SAL_CALL OMetaConnection::getSomething( const css::uno::Sequence< sal_
     return comphelper::getSomethingImpl(rId, this);
 }
 
-Sequence< sal_Int8 > OMetaConnection::getUnoTunnelId()
+const Sequence< sal_Int8 > & OMetaConnection::getUnoTunnelId()
 {
     static const comphelper::UnoIdInit implId;
     return implId.getSeq();
diff --git a/connectivity/source/commontools/TTableHelper.cxx b/connectivity/source/commontools/TTableHelper.cxx
index 2436776fb177..31e240469402 100644
--- a/connectivity/source/commontools/TTableHelper.cxx
+++ b/connectivity/source/commontools/TTableHelper.cxx
@@ -549,7 +549,7 @@ OUString SAL_CALL OTableHelper::getName()
     return sComposedName;
 }
 
-OUString OTableHelper::getTableName()
+const OUString & OTableHelper::getTableName()
 {
     return m_Name;
 }
diff --git a/connectivity/source/drivers/calc/CTable.cxx b/connectivity/source/drivers/calc/CTable.cxx
index 90e7c4e08bed..53a8c8eeb855 100644
--- a/connectivity/source/drivers/calc/CTable.cxx
+++ b/connectivity/source/drivers/calc/CTable.cxx
@@ -608,7 +608,7 @@ void SAL_CALL OCalcTable::disposing()
 
 }
 
-Sequence< sal_Int8 > OCalcTable::getUnoTunnelId()
+const Sequence< sal_Int8 > & OCalcTable::getUnoTunnelId()
 {
     static const comphelper::UnoIdInit implId;
     return implId.getSeq();
diff --git a/connectivity/source/drivers/dbase/DIndex.cxx b/connectivity/source/drivers/dbase/DIndex.cxx
index 245c49b58e2f..4ac8b1a41722 100644
--- a/connectivity/source/drivers/dbase/DIndex.cxx
+++ b/connectivity/source/drivers/dbase/DIndex.cxx
@@ -99,7 +99,7 @@ void ODbaseIndex::refreshColumns()
         m_pColumns.reset(new ODbaseIndexColumns(this,m_aMutex,aVector));
 }
 
-Sequence< sal_Int8 > ODbaseIndex::getUnoTunnelId()
+const Sequence< sal_Int8 > & ODbaseIndex::getUnoTunnelId()
 {
     static const comphelper::UnoIdInit implId;
     return implId.getSeq();
diff --git a/connectivity/source/drivers/dbase/DTable.cxx b/connectivity/source/drivers/dbase/DTable.cxx
index fd4b5ea85cc2..eedba74a57cd 100644
--- a/connectivity/source/drivers/dbase/DTable.cxx
+++ b/connectivity/source/drivers/dbase/DTable.cxx
@@ -765,7 +765,7 @@ Any SAL_CALL ODbaseTable::queryInterface( const Type & rType )
 }
 
 
-Sequence< sal_Int8 > ODbaseTable::getUnoTunnelId()
+const Sequence< sal_Int8 > & ODbaseTable::getUnoTunnelId()
 {
     static const comphelper::UnoIdInit implId;
     return implId.getSeq();
diff --git a/connectivity/source/drivers/file/FConnection.cxx b/connectivity/source/drivers/file/FConnection.cxx
index 283bee8fee45..90030abb51db 100644
--- a/connectivity/source/drivers/file/FConnection.cxx
+++ b/connectivity/source/drivers/file/FConnection.cxx
@@ -405,7 +405,7 @@ sal_Int64 SAL_CALL OConnection::getSomething( const Sequence< sal_Int8 >& rId )
     return comphelper::getSomethingImpl(rId, this);
 }
 
-Sequence< sal_Int8 > OConnection::getUnoTunnelId()
+const Sequence< sal_Int8 > & OConnection::getUnoTunnelId()
 {
     static const comphelper::UnoIdInit implId;
     return implId.getSeq();
diff --git a/connectivity/source/drivers/file/FResultSet.cxx b/connectivity/source/drivers/file/FResultSet.cxx
index fdf3a4e47d84..43ad38739d5b 100644
--- a/connectivity/source/drivers/file/FResultSet.cxx
+++ b/connectivity/source/drivers/file/FResultSet.cxx
@@ -1380,7 +1380,7 @@ void OResultSet::OpenImpl()
     m_nFilePos  = 0;
 }
 
-Sequence< sal_Int8 > OResultSet::getUnoTunnelId()
+const Sequence< sal_Int8 > & OResultSet::getUnoTunnelId()
 {
     static const comphelper::UnoIdInit implId;
     return implId.getSeq();
diff --git a/connectivity/source/drivers/file/FTable.cxx b/connectivity/source/drivers/file/FTable.cxx
index af2d6de226f8..6ec776452d8a 100644
--- a/connectivity/source/drivers/file/FTable.cxx
+++ b/connectivity/source/drivers/file/FTable.cxx
@@ -118,7 +118,7 @@ void SAL_CALL OFileTable::disposing()
     FileClose();
 }
 
-Sequence< sal_Int8 > OFileTable::getUnoTunnelId()
+const Sequence< sal_Int8 > & OFileTable::getUnoTunnelId()
 {
     static const comphelper::UnoIdInit s_Id;
     return s_Id.getSeq();
diff --git a/connectivity/source/drivers/firebird/Connection.cxx b/connectivity/source/drivers/firebird/Connection.cxx
index 64a8495bfc3c..9230eb22f13b 100644
--- a/connectivity/source/drivers/firebird/Connection.cxx
+++ b/connectivity/source/drivers/firebird/Connection.cxx
@@ -383,7 +383,7 @@ sal_Int64 SAL_CALL Connection::getSomething(const css::uno::Sequence<sal_Int8>&
 }
 
 // static
-css::uno::Sequence<sal_Int8> Connection::getUnoTunnelId()
+const css::uno::Sequence<sal_Int8> & Connection::getUnoTunnelId()
 {
     static const comphelper::UnoIdInit implId;
     return implId.getSeq();
diff --git a/connectivity/source/drivers/firebird/Connection.hxx b/connectivity/source/drivers/firebird/Connection.hxx
index caf091146ae6..9fdb0d4d3320 100644
--- a/connectivity/source/drivers/firebird/Connection.hxx
+++ b/connectivity/source/drivers/firebird/Connection.hxx
@@ -210,7 +210,7 @@ namespace connectivity::firebird
             DECLARE_SERVICE_INFO();
             // XUnoTunnel
             virtual sal_Int64 SAL_CALL getSomething(const css::uno::Sequence<sal_Int8>& rId) override;
-            static css::uno::Sequence<sal_Int8> getUnoTunnelId();
+            static const css::uno::Sequence<sal_Int8> & getUnoTunnelId();
             // XConnection
             virtual css::uno::Reference< css::sdbc::XStatement > SAL_CALL createStatement(  ) override;
             virtual css::uno::Reference< css::sdbc::XPreparedStatement > SAL_CALL prepareStatement( const OUString& sql ) override;
diff --git a/connectivity/source/drivers/flat/ETable.cxx b/connectivity/source/drivers/flat/ETable.cxx
index 4c8c446dfeaa..dd7342419d61 100644
--- a/connectivity/source/drivers/flat/ETable.cxx
+++ b/connectivity/source/drivers/flat/ETable.cxx
@@ -549,7 +549,7 @@ Any SAL_CALL OFlatTable::queryInterface( const Type & rType )
 }
 
 
-Sequence< sal_Int8 > OFlatTable::getUnoTunnelId()
+const Sequence< sal_Int8 > & OFlatTable::getUnoTunnelId()
 {
     static const comphelper::UnoIdInit implId;
     return implId.getSeq();
diff --git a/connectivity/source/drivers/hsqldb/HTable.cxx b/connectivity/source/drivers/hsqldb/HTable.cxx
index 9a23b6052468..fcc50bba4bc5 100644
--- a/connectivity/source/drivers/hsqldb/HTable.cxx
+++ b/connectivity/source/drivers/hsqldb/HTable.cxx
@@ -115,7 +115,7 @@ sdbcx::OCollection* OHSQLTable::createIndexes(const ::std::vector< OUString>& _r
     return new OIndexesHelper(this,m_aMutex,_rNames);
 }
 
-Sequence< sal_Int8 > OHSQLTable::getUnoTunnelId()
+const Sequence< sal_Int8 > & OHSQLTable::getUnoTunnelId()
 {
     static const comphelper::UnoIdInit implId;
     return implId.getSeq();
diff --git a/connectivity/source/drivers/mysql_jdbc/YTable.cxx b/connectivity/source/drivers/mysql_jdbc/YTable.cxx
index b5b02fefc1bc..f769089482a1 100644
--- a/connectivity/source/drivers/mysql_jdbc/YTable.cxx
+++ b/connectivity/source/drivers/mysql_jdbc/YTable.cxx
@@ -116,7 +116,7 @@ sdbcx::OCollection* OMySQLTable::createIndexes(const ::std::vector<OUString>& _r
     return new OIndexesHelper(this, m_aMutex, _rNames);
 }
 
-Sequence<sal_Int8> OMySQLTable::getUnoTunnelId()
+const Sequence<sal_Int8>& OMySQLTable::getUnoTunnelId()
 {
     static const comphelper::UnoIdInit implId;
     return implId.getSeq();
diff --git a/connectivity/source/drivers/mysqlc/mysqlc_connection.cxx b/connectivity/source/drivers/mysqlc/mysqlc_connection.cxx
index 22e5c0ad0c41..dd2f9e5dd20c 100644
--- a/connectivity/source/drivers/mysqlc/mysqlc_connection.cxx
+++ b/connectivity/source/drivers/mysqlc/mysqlc_connection.cxx
@@ -497,7 +497,7 @@ sal_Int64 SAL_CALL OConnection::getSomething(const css::uno::Sequence<sal_Int8>&
 }
 
 // static
-Sequence<sal_Int8> OConnection::getUnoTunnelId()
+const Sequence<sal_Int8>& OConnection::getUnoTunnelId()
 {
     static const comphelper::UnoIdInit implId;
     return implId.getSeq();
diff --git a/connectivity/source/drivers/mysqlc/mysqlc_connection.hxx b/connectivity/source/drivers/mysqlc/mysqlc_connection.hxx
index d6040ec65b7f..3a0ccf36b4ed 100644
--- a/connectivity/source/drivers/mysqlc/mysqlc_connection.hxx
+++ b/connectivity/source/drivers/mysqlc/mysqlc_connection.hxx
@@ -127,7 +127,7 @@ public:
 
     // XUnoTunnel
     virtual sal_Int64 SAL_CALL getSomething(const css::uno::Sequence<sal_Int8>& rId) override;
-    static css::uno::Sequence<sal_Int8> getUnoTunnelId();
+    static const css::uno::Sequence<sal_Int8>& getUnoTunnelId();
 
     // XConnection
     css::uno::Reference<css::sdbc::XStatement> SAL_CALL createStatement() override;
diff --git a/connectivity/source/drivers/writer/WTable.cxx b/connectivity/source/drivers/writer/WTable.cxx
index 2f76fc4a09d0..42b65173e09c 100644
--- a/connectivity/source/drivers/writer/WTable.cxx
+++ b/connectivity/source/drivers/writer/WTable.cxx
@@ -210,7 +210,7 @@ void SAL_CALL OWriterTable::disposing()
     m_pWriterConnection = nullptr;
 }
 
-uno::Sequence<sal_Int8> OWriterTable::getUnoTunnelId()
+const uno::Sequence<sal_Int8>& OWriterTable::getUnoTunnelId()
 {
     static const comphelper::UnoIdInit implId;
     return implId.getSeq();
diff --git a/connectivity/source/inc/TConnection.hxx b/connectivity/source/inc/TConnection.hxx
index 246e968b8a32..2dbe2ef6a756 100644
--- a/connectivity/source/inc/TConnection.hxx
+++ b/connectivity/source/inc/TConnection.hxx
@@ -73,7 +73,7 @@ namespace connectivity
 
         //XUnoTunnel
         virtual sal_Int64 SAL_CALL getSomething( const css::uno::Sequence< sal_Int8 >& aIdentifier ) override;
-        static css::uno::Sequence< sal_Int8 > getUnoTunnelId();
+        static const css::uno::Sequence< sal_Int8 > & getUnoTunnelId();
     };
 }
 
diff --git a/connectivity/source/inc/calc/CTable.hxx b/connectivity/source/inc/calc/CTable.hxx
index a8f49b661bc4..2c0e1d0e8d5c 100644
--- a/connectivity/source/inc/calc/CTable.hxx
+++ b/connectivity/source/inc/calc/CTable.hxx
@@ -66,7 +66,7 @@ namespace connectivity::calc
 
             // css::lang::XUnoTunnel
             virtual sal_Int64 SAL_CALL getSomething( const css::uno::Sequence< sal_Int8 >& aIdentifier ) override;
-            static css::uno::Sequence< sal_Int8 > getUnoTunnelId();
+            static const css::uno::Sequence< sal_Int8 > & getUnoTunnelId();
 
             void construct() override;
         };
diff --git a/connectivity/source/inc/dbase/DIndex.hxx b/connectivity/source/inc/dbase/DIndex.hxx
index a75ce918ff6c..cd18ded0cbb1 100644
--- a/connectivity/source/inc/dbase/DIndex.hxx
+++ b/connectivity/source/inc/dbase/DIndex.hxx
@@ -93,7 +93,7 @@ namespace connectivity::dbase
 
             // css::lang::XUnoTunnel
             virtual sal_Int64 SAL_CALL getSomething( const css::uno::Sequence< sal_Int8 >& aIdentifier ) override;
-            static css::uno::Sequence< sal_Int8 > getUnoTunnelId();
+            static const css::uno::Sequence< sal_Int8 > & getUnoTunnelId();
 
             const ODbaseTable* getTable() const { return m_pTable; }
             const NDXHeader& getHeader() const { return m_aHeader; }
diff --git a/connectivity/source/inc/dbase/DTable.hxx b/connectivity/source/inc/dbase/DTable.hxx
index 6e7b2e184c32..1ac5eccbb9cf 100644
--- a/connectivity/source/inc/dbase/DTable.hxx
+++ b/connectivity/source/inc/dbase/DTable.hxx
@@ -163,7 +163,7 @@ namespace connectivity::dbase
 
             // css::lang::XUnoTunnel
             virtual sal_Int64 SAL_CALL getSomething( const css::uno::Sequence< sal_Int8 >& aIdentifier ) override;
-            static css::uno::Sequence< sal_Int8 > getUnoTunnelId();
+            static const css::uno::Sequence< sal_Int8 > & getUnoTunnelId();
             // XAlterTable
             virtual void SAL_CALL alterColumnByName( const OUString& colName, const css::uno::Reference< css::beans::XPropertySet >& descriptor ) override;
             virtual void SAL_CALL alterColumnByIndex( sal_Int32 index, const css::uno::Reference< css::beans::XPropertySet >& descriptor ) override;
diff --git a/connectivity/source/inc/file/FConnection.hxx b/connectivity/source/inc/file/FConnection.hxx
index 36b095e70427..e6412992ab77 100644
--- a/connectivity/source/inc/file/FConnection.hxx
+++ b/connectivity/source/inc/file/FConnection.hxx
@@ -98,7 +98,7 @@ namespace connectivity::file
             virtual void SAL_CALL clearWarnings(  ) override;
             //XUnoTunnel
             virtual sal_Int64 SAL_CALL getSomething( const css::uno::Sequence< sal_Int8 >& aIdentifier ) override;
-            static css::uno::Sequence< sal_Int8 > getUnoTunnelId();
+            static const css::uno::Sequence< sal_Int8 > & getUnoTunnelId();
 
             // no interface methods
             css::uno::Reference< css::ucb::XDynamicResultSet > getDir() const;
diff --git a/connectivity/source/inc/file/FResultSet.hxx b/connectivity/source/inc/file/FResultSet.hxx
index 71d222d82030..a7aa77ff2576 100644
--- a/connectivity/source/inc/file/FResultSet.hxx
+++ b/connectivity/source/inc/file/FResultSet.hxx
@@ -247,7 +247,7 @@ namespace connectivity::file
             virtual sal_Int32 SAL_CALL findColumn( const OUString& columnName ) override;
             // css::lang::XUnoTunnel
             virtual sal_Int64 SAL_CALL getSomething( const css::uno::Sequence< sal_Int8 >& aIdentifier ) override;
-            static css::uno::Sequence< sal_Int8 > getUnoTunnelId();
+            static const css::uno::Sequence< sal_Int8 > & getUnoTunnelId();
             //XEventlistener
             virtual void SAL_CALL disposing( const css::lang::EventObject& Source ) override;
 
diff --git a/connectivity/source/inc/file/FTable.hxx b/connectivity/source/inc/file/FTable.hxx
index 80c662ba4d38..4f925f799ca5 100644
--- a/connectivity/source/inc/file/FTable.hxx
+++ b/connectivity/source/inc/file/FTable.hxx
@@ -85,7 +85,7 @@ namespace connectivity::file
                 // m_pFileStream && !m_pFileStream->IsWritable(); }
             // css::lang::XUnoTunnel
             virtual sal_Int64 SAL_CALL getSomething( const css::uno::Sequence< sal_Int8 >& aIdentifier ) override;
-            static css::uno::Sequence< sal_Int8 > getUnoTunnelId();
+            static const css::uno::Sequence< sal_Int8 > & getUnoTunnelId();
 
 
             sal_Int32 getFilePos() const { return m_nFilePos; }
diff --git a/connectivity/source/inc/flat/ETable.hxx b/connectivity/source/inc/flat/ETable.hxx
index 2e15040d74d1..ae283c10bcb0 100644
--- a/connectivity/source/inc/flat/ETable.hxx
+++ b/connectivity/source/inc/flat/ETable.hxx
@@ -94,7 +94,7 @@ namespace connectivity::flat
 
             // css::lang::XUnoTunnel
             virtual sal_Int64 SAL_CALL getSomething( const css::uno::Sequence< sal_Int8 >& aIdentifier ) override;
-            static css::uno::Sequence< sal_Int8 > getUnoTunnelId();
+            static const css::uno::Sequence< sal_Int8 > & getUnoTunnelId();
 
             OUString getEntry() const;
         };
diff --git a/connectivity/source/inc/hsqldb/HTable.hxx b/connectivity/source/inc/hsqldb/HTable.hxx
index bc345d775c28..060784115507 100644
--- a/connectivity/source/inc/hsqldb/HTable.hxx
+++ b/connectivity/source/inc/hsqldb/HTable.hxx
@@ -87,7 +87,7 @@ namespace connectivity::hsqldb
             virtual void construct() override;
             // css::lang::XUnoTunnel
             virtual sal_Int64 SAL_CALL getSomething( const css::uno::Sequence< sal_Int8 >& aIdentifier ) override;
-            static css::uno::Sequence< sal_Int8 > getUnoTunnelId();
+            static const css::uno::Sequence< sal_Int8 > & getUnoTunnelId();
 
             virtual css::uno::Any SAL_CALL queryInterface( const css::uno::Type & rType ) override;
             //XTypeProvider
diff --git a/connectivity/source/inc/mysql/YTable.hxx b/connectivity/source/inc/mysql/YTable.hxx
index 534c2319accb..1cb89b4c8859 100644
--- a/connectivity/source/inc/mysql/YTable.hxx
+++ b/connectivity/source/inc/mysql/YTable.hxx
@@ -94,7 +94,7 @@ namespace connectivity::mysql
             virtual void construct() override;
             // css::lang::XUnoTunnel
             virtual sal_Int64 SAL_CALL getSomething( const css::uno::Sequence< sal_Int8 >& aIdentifier ) override;
-            static css::uno::Sequence< sal_Int8 > getUnoTunnelId();
+            static const css::uno::Sequence< sal_Int8 > & getUnoTunnelId();
 
             // XAlterTable
             virtual void SAL_CALL alterColumnByName( const OUString& colName, const css::uno::Reference< css::beans::XPropertySet >& descriptor ) override;
diff --git a/connectivity/source/inc/writer/WTable.hxx b/connectivity/source/inc/writer/WTable.hxx
index e19872df531d..90cdc2494411 100644
--- a/connectivity/source/inc/writer/WTable.hxx
+++ b/connectivity/source/inc/writer/WTable.hxx
@@ -56,7 +56,7 @@ public:
 
     // css::lang::XUnoTunnel
     sal_Int64 SAL_CALL getSomething(const css::uno::Sequence<sal_Int8>& rId) override;
-    static css::uno::Sequence<sal_Int8> getUnoTunnelId();
+    static const css::uno::Sequence<sal_Int8>& getUnoTunnelId();
 
     void construct() override;
 };
diff --git a/connectivity/source/sdbcx/VDescriptor.cxx b/connectivity/source/sdbcx/VDescriptor.cxx
index 7800aaf075be..ce3b437d95f3 100644
--- a/connectivity/source/sdbcx/VDescriptor.cxx
+++ b/connectivity/source/sdbcx/VDescriptor.cxx
@@ -91,7 +91,7 @@ namespace connectivity::sdbcx
         }
 
 
-        Sequence< sal_Int8 > ODescriptor::getUnoTunnelId()
+        const Sequence< sal_Int8 > & ODescriptor::getUnoTunnelId()
         {
             static const comphelper::UnoIdInit implId;
             return implId.getSeq();
diff --git a/cui/source/dialogs/QrCodeGenDialog.cxx b/cui/source/dialogs/QrCodeGenDialog.cxx
index 0e24ded70cd1..3e7b48e7af86 100644
--- a/cui/source/dialogs/QrCodeGenDialog.cxx
+++ b/cui/source/dialogs/QrCodeGenDialog.cxx
@@ -100,7 +100,7 @@ OString ConvertToSVGFormat(const ZXing::BitMatrix& bitmatrix)
     return sb.toString();
 }
 
-std::string GetBarCodeType(const int& type)
+std::string GetBarCodeType(int type)
 {
     switch (type)
     {
diff --git a/dbaccess/source/core/api/RowSet.cxx b/dbaccess/source/core/api/RowSet.cxx
index 9de8f00537c3..1cf4a8f37751 100644
--- a/dbaccess/source/core/api/RowSet.cxx
+++ b/dbaccess/source/core/api/RowSet.cxx
@@ -425,7 +425,7 @@ sal_Int64 SAL_CALL ORowSet::getSomething( const Sequence< sal_Int8 >& rId )
     return comphelper::getSomethingImpl(rId, this);
 }
 
-Sequence< sal_Int8 > ORowSet::getUnoTunnelId()
+const Sequence< sal_Int8 > & ORowSet::getUnoTunnelId()
 {
     static const comphelper::UnoIdInit s_Id;
     return s_Id.getSeq();
@@ -2903,7 +2903,7 @@ void ORowSetClone::close()
     return *::comphelper::OPropertyArrayUsageHelper<ORowSetClone>::getArrayHelper();
 }
 
-Sequence< sal_Int8 > ORowSetClone::getUnoTunnelId()
+const Sequence< sal_Int8 > & ORowSetClone::getUnoTunnelId()
 {
     static const comphelper::UnoIdInit implId;
     return implId.getSeq();
diff --git a/dbaccess/source/core/api/RowSet.hxx b/dbaccess/source/core/api/RowSet.hxx
index da4da6c24e01..afe49a923c26 100644
--- a/dbaccess/source/core/api/RowSet.hxx
+++ b/dbaccess/source/core/api/RowSet.hxx
@@ -257,7 +257,7 @@ namespace dbaccess
 
     // css::lang::XUnoTunnel
         virtual sal_Int64 SAL_CALL getSomething( const css::uno::Sequence< sal_Int8 >& aIdentifier ) override;
-        static css::uno::Sequence< sal_Int8 > getUnoTunnelId();
+        static const css::uno::Sequence< sal_Int8 > & getUnoTunnelId();
 
     // css::uno::XAggregation
         virtual css::uno::Any SAL_CALL queryAggregation( const css::uno::Type& aType ) override;
@@ -489,7 +489,7 @@ namespace dbaccess
 
     // css::lang::XUnoTunnel
         virtual sal_Int64 SAL_CALL getSomething( const css::uno::Sequence< sal_Int8 >& aIdentifier ) override;
-        static css::uno::Sequence< sal_Int8 > getUnoTunnelId();
+        static const css::uno::Sequence< sal_Int8 > & getUnoTunnelId();
 
     // OComponentHelper
         virtual void SAL_CALL disposing() override;
diff --git a/dbaccess/source/core/api/TableDeco.cxx b/dbaccess/source/core/api/TableDeco.cxx
index abd206b6e147..92821750f9dc 100644
--- a/dbaccess/source/core/api/TableDeco.cxx
+++ b/dbaccess/source/core/api/TableDeco.cxx
@@ -477,7 +477,7 @@ sal_Int64 SAL_CALL ODBTableDecorator::getSomething( const Sequence< sal_Int8 >&
     return nRet;
 }
 
-Sequence< sal_Int8 > ODBTableDecorator::getUnoTunnelId()
+const Sequence< sal_Int8 > & ODBTableDecorator::getUnoTunnelId()
 {
     static const comphelper::UnoIdInit implId;
     return implId.getSeq();
diff --git a/dbaccess/source/core/api/querydescriptor.cxx b/dbaccess/source/core/api/querydescriptor.cxx
index b9e7a0debca4..0ac6d76e3077 100644
--- a/dbaccess/source/core/api/querydescriptor.cxx
+++ b/dbaccess/source/core/api/querydescriptor.cxx
@@ -149,7 +149,7 @@ sal_Int64 SAL_CALL OQueryDescriptor_Base::getSomething( const Sequence< sal_Int8
     return comphelper::getSomethingImpl(_rIdentifier, this);
 }
 
-css::uno::Sequence<sal_Int8> OQueryDescriptor_Base::getUnoTunnelId()
+const css::uno::Sequence<sal_Int8> & OQueryDescriptor_Base::getUnoTunnelId()
 {
     static const comphelper::UnoIdInit aId;
     return aId.getSeq();
diff --git a/dbaccess/source/core/api/querydescriptor.hxx b/dbaccess/source/core/api/querydescriptor.hxx
index e0930c8335a3..e78b035dace0 100644
--- a/dbaccess/source/core/api/querydescriptor.hxx
+++ b/dbaccess/source/core/api/querydescriptor.hxx
@@ -78,7 +78,7 @@ public:
 // css::lang::XUnoTunnel
     virtual sal_Int64 SAL_CALL getSomething( const css::uno::Sequence< sal_Int8 >& aIdentifier ) override;
     virtual css::uno::Sequence<sal_Int8> SAL_CALL getImplementationId(  ) override;
-    static css::uno::Sequence< sal_Int8 >  getUnoTunnelId();
+    static const css::uno::Sequence< sal_Int8 > & getUnoTunnelId();
 
 
 // css::lang::XServiceInfo
diff --git a/dbaccess/source/core/api/table.cxx b/dbaccess/source/core/api/table.cxx
index 50467cfa0c2e..f9a1dffb956a 100644
--- a/dbaccess/source/core/api/table.cxx
+++ b/dbaccess/source/core/api/table.cxx
@@ -315,7 +315,7 @@ sal_Int64 SAL_CALL ODBTable::getSomething( const Sequence< sal_Int8 >& rId )
                                         comphelper::FallbackToGetSomethingOf<OTable_Base>{});
 }
 
-Sequence< sal_Int8 > ODBTable::getUnoTunnelId()
+const Sequence< sal_Int8 > & ODBTable::getUnoTunnelId()
 {
     static const comphelper::UnoIdInit s_Id;
     return s_Id.getSeq();
diff --git a/dbaccess/source/core/dataaccess/ContentHelper.cxx b/dbaccess/source/core/dataaccess/ContentHelper.cxx
index 1623a579471b..a297abf66ecc 100644
--- a/dbaccess/source/core/dataaccess/ContentHelper.cxx
+++ b/dbaccess/source/core/dataaccess/ContentHelper.cxx
@@ -104,7 +104,7 @@ css::uno::Sequence< OUString > SAL_CALL OContentHelper::getSupportedServiceNames
 }
 
 
-css::uno::Sequence<sal_Int8> OContentHelper::getUnoTunnelId()
+const css::uno::Sequence<sal_Int8> & OContentHelper::getUnoTunnelId()
 {
     static const comphelper::UnoIdInit aId;
     return aId.getSeq();
diff --git a/dbaccess/source/core/dataaccess/databasecontext.cxx b/dbaccess/source/core/dataaccess/databasecontext.cxx
index 703553913fcc..471bdd8ad399 100644
--- a/dbaccess/source/core/dataaccess/databasecontext.cxx
+++ b/dbaccess/source/core/dataaccess/databasecontext.cxx
@@ -712,7 +712,7 @@ sal_Int64 SAL_CALL ODatabaseContext::getSomething( const Sequence< sal_Int8 >& r
     return comphelper::getSomethingImpl(rId, this);
 }
 
-Sequence< sal_Int8 > ODatabaseContext::getUnoTunnelId()
+const Sequence< sal_Int8 > & ODatabaseContext::getUnoTunnelId()
 {
     static const comphelper::UnoIdInit implId;
     return implId.getSeq();
diff --git a/dbaccess/source/core/inc/ContentHelper.hxx b/dbaccess/source/core/inc/ContentHelper.hxx
index 5168f1307824..004b785ef185 100644
--- a/dbaccess/source/core/inc/ContentHelper.hxx
+++ b/dbaccess/source/core/inc/ContentHelper.hxx
@@ -157,7 +157,7 @@ namespace dbaccess
 
         // css::lang::XUnoTunnel
         virtual sal_Int64 SAL_CALL getSomething( const css::uno::Sequence< sal_Int8 >& aIdentifier ) override;
-        static css::uno::Sequence< sal_Int8 >  getUnoTunnelId();
+        static const css::uno::Sequence< sal_Int8 > & getUnoTunnelId();
 
         // css::container::XChild
         virtual css::uno::Reference< css::uno::XInterface > SAL_CALL getParent(  ) override;
diff --git a/dbaccess/source/core/inc/TableDeco.hxx b/dbaccess/source/core/inc/TableDeco.hxx
index 5e2cb214fb8a..e40fac80290c 100644
--- a/dbaccess/source/core/inc/TableDeco.hxx
+++ b/dbaccess/source/core/inc/TableDeco.hxx
@@ -145,7 +145,7 @@ namespace dbaccess
         virtual void SAL_CALL setName( const OUString& aName ) override;
         // css::lang::XUnoTunnel
         virtual sal_Int64 SAL_CALL getSomething( const css::uno::Sequence< sal_Int8 >& aIdentifier ) override;
-        static css::uno::Sequence< sal_Int8 > getUnoTunnelId();
+        static const css::uno::Sequence< sal_Int8 > & getUnoTunnelId();
 
         // XColumnsSupplier
         virtual css::uno::Reference< css::container::XNameAccess > SAL_CALL getColumns(  ) override;
diff --git a/dbaccess/source/core/inc/databasecontext.hxx b/dbaccess/source/core/inc/databasecontext.hxx
index 2f8924f9f837..e15585c819d1 100644
--- a/dbaccess/source/core/inc/databasecontext.hxx
+++ b/dbaccess/source/core/inc/databasecontext.hxx
@@ -158,7 +158,7 @@ public:
 
     // css::lang::XUnoTunnel
     virtual sal_Int64 SAL_CALL getSomething( const css::uno::Sequence< sal_Int8 >& aIdentifier ) override;
-    static css::uno::Sequence< sal_Int8 > getUnoTunnelId();
+    static const css::uno::Sequence< sal_Int8 > & getUnoTunnelId();
 
     void registerDatabaseDocument( ODatabaseModelImpl& _rModelImpl);
     void revokeDatabaseDocument( const ODatabaseModelImpl& _rModelImpl);
diff --git a/dbaccess/source/core/inc/table.hxx b/dbaccess/source/core/inc/table.hxx
index 069579c632e3..8c29bff44772 100644
--- a/dbaccess/source/core/inc/table.hxx
+++ b/dbaccess/source/core/inc/table.hxx
@@ -114,7 +114,7 @@ namespace dbaccess
         //XTypeProvider
         virtual css::uno::Sequence< css::uno::Type > SAL_CALL getTypes(  ) override;
         virtual css::uno::Sequence< sal_Int8 > SAL_CALL getImplementationId() override;
-        static css::uno::Sequence< sal_Int8 > getUnoTunnelId();
+        static const css::uno::Sequence< sal_Int8 > & getUnoTunnelId();
 
     // css::lang::XServiceInfo
         DECLARE_SERVICE_INFO();
diff --git a/dbaccess/source/ui/inc/JoinExchange.hxx b/dbaccess/source/ui/inc/JoinExchange.hxx
index 73f9ea884540..7401ec886e44 100644
--- a/dbaccess/source/ui/inc/JoinExchange.hxx
+++ b/dbaccess/source/ui/inc/JoinExchange.hxx
@@ -47,7 +47,7 @@ namespace dbaui
         virtual void SAL_CALL release(  ) noexcept override;
 
         // XUnoTunnel
-        static css::uno::Sequence< sal_Int8 > getUnoTunnelId();
+        static const css::uno::Sequence< sal_Int8 > & getUnoTunnelId();
         virtual sal_Int64 SAL_CALL getSomething( const css::uno::Sequence< sal_Int8 >& _rIdentifier ) override;
 
         static OJoinExchangeData    GetSourceDescription(const css::uno::Reference< css::datatransfer::XTransferable >& _rxObject);
diff --git a/dbaccess/source/ui/querydesign/JoinExchange.cxx b/dbaccess/source/ui/querydesign/JoinExchange.cxx
index 9a06fa7ab488..0dc88e2cc794 100644
--- a/dbaccess/source/ui/querydesign/JoinExchange.cxx
+++ b/dbaccess/source/ui/querydesign/JoinExchange.cxx
@@ -61,7 +61,7 @@ namespace dbaui
         return aReturn;
     }
 
-    Sequence< sal_Int8 > OJoinExchObj::getUnoTunnelId()
+    const Sequence< sal_Int8 > & OJoinExchObj::getUnoTunnelId()
     {
         static const comphelper::UnoIdInit implId;
         return implId.getSeq();
diff --git a/forms/source/richtext/richtextmodel.cxx b/forms/source/richtext/richtextmodel.cxx
index 1f5037b62d71..9f4266be1710 100644
--- a/forms/source/richtext/richtextmodel.cxx
+++ b/forms/source/richtext/richtextmodel.cxx
@@ -559,7 +559,7 @@ namespace frm
     }
 
 
-    Sequence<sal_Int8> ORichTextModel::getUnoTunnelId()
+    const Sequence<sal_Int8> & ORichTextModel::getUnoTunnelId()
     {
         static const comphelper::UnoIdInit aId;
         return aId.getSeq();
diff --git a/forms/source/richtext/richtextmodel.hxx b/forms/source/richtext/richtextmodel.hxx
index 3dc0987b33b3..cf0bae7db435 100644
--- a/forms/source/richtext/richtextmodel.hxx
+++ b/forms/source/richtext/richtextmodel.hxx
@@ -126,7 +126,7 @@ namespace frm
 
         // XUnoTunnel
         virtual sal_Int64 SAL_CALL getSomething( const css::uno::Sequence< sal_Int8 >& aIdentifier ) override;
-        static css::uno::Sequence<sal_Int8> getUnoTunnelId();
+        static const css::uno::Sequence<sal_Int8> & getUnoTunnelId();
 
         // XModifyBroadcaster
         virtual void SAL_CALL addModifyListener( const css::uno::Reference< css::util::XModifyListener >& aListener ) override;
diff --git a/include/comphelper/accimplaccess.hxx b/include/comphelper/accimplaccess.hxx
index 4aec719eac8b..e716d4d18905 100644
--- a/include/comphelper/accimplaccess.hxx
+++ b/include/comphelper/accimplaccess.hxx
@@ -63,7 +63,7 @@ namespace comphelper
         virtual sal_Int64 SAL_CALL getSomething( const css::uno::Sequence< sal_Int8 >& _rIdentifier ) override;
 
     public:
-        COMPHELPER_DLLPRIVATE static css::uno::Sequence<sal_Int8> getUnoTunnelId();
+        COMPHELPER_DLLPRIVATE static const css::uno::Sequence<sal_Int8> & getUnoTunnelId();
     };
 
 } // namespace comphelper
diff --git a/include/connectivity/ConnectionWrapper.hxx b/include/connectivity/ConnectionWrapper.hxx
index b621cd041b51..8eac6a7b96a2 100644
--- a/include/connectivity/ConnectionWrapper.hxx
+++ b/include/connectivity/ConnectionWrapper.hxx
@@ -67,7 +67,7 @@ namespace connectivity
 
         // css::lang::XUnoTunnel
         virtual sal_Int64 SAL_CALL getSomething( const css::uno::Sequence< sal_Int8 >& aIdentifier ) override;
-        static css::uno::Sequence< sal_Int8 > getUnoTunnelId();
+        static const css::uno::Sequence< sal_Int8 > & getUnoTunnelId();
         /** method to create unique ids
             @param  _rURL
                 The URL.
diff --git a/include/connectivity/TTableHelper.hxx b/include/connectivity/TTableHelper.hxx
index a322964bb795..e987241a6847 100644
--- a/include/connectivity/TTableHelper.hxx
+++ b/include/connectivity/TTableHelper.hxx
@@ -149,7 +149,7 @@ namespace connectivity
         virtual OUString SAL_CALL getName() override;
 
         // To retrieve the table name only without the schema
-        OUString getTableName();
+        const OUString & getTableName();
 
         // helper method to get key properties
         std::shared_ptr<sdbcx::KeyProperties> getKeyProperties(const OUString& _sName) const;
diff --git a/include/connectivity/sdbcx/VDescriptor.hxx b/include/connectivity/sdbcx/VDescriptor.hxx
index 4127a423615a..3147a5187fa7 100644
--- a/include/connectivity/sdbcx/VDescriptor.hxx
+++ b/include/connectivity/sdbcx/VDescriptor.hxx
@@ -70,7 +70,7 @@ namespace connectivity::sdbcx
 
             // css::lang::XUnoTunnel
             virtual sal_Int64 SAL_CALL getSomething( const css::uno::Sequence< sal_Int8 >& aIdentifier ) override;
-            static css::uno::Sequence< sal_Int8 > getUnoTunnelId();
+            static const css::uno::Sequence< sal_Int8 > & getUnoTunnelId();
 
             // retrieves the ODescriptor implementation of a given UNO component, and returns its ->isNew flag
             static bool isNew( const css::uno::Reference< css::uno::XInterface >& _rxDescriptor );
diff --git a/include/oox/export/chartexport.hxx b/include/oox/export/chartexport.hxx
index 3e12e5de725a..6a40254f6491 100644
--- a/include/oox/export/chartexport.hxx
+++ b/include/oox/export/chartexport.hxx
@@ -112,7 +112,7 @@ public:
     /// Indicates whether the container has a label with index specified by nIndex.
     bool hasLabel(sal_Int32 nIndex) const;
     /// Returns the address of the cell[range] from which label contents are sourced.
-    OUString getRange() const;
+    const OUString & getRange() const;
 
     /// Sets the address of the cell[range] from which label contents are sourced.
     void setRange(const OUString& rRange);
diff --git a/include/oox/shape/ShapeContextHandler.hxx b/include/oox/shape/ShapeContextHandler.hxx
index d79ae4d17a1f..2e108d8cd4f2 100644
--- a/include/oox/shape/ShapeContextHandler.hxx
+++ b/include/oox/shape/ShapeContextHandler.hxx
@@ -97,7 +97,7 @@ public:
     void setPosition(const css::awt::Point& rPosition);
 
     const bool& getFullWPGSupport() { return m_bFullWPGSUpport; }
-    void setFullWPGSupport(const bool& rbUse) { m_bFullWPGSUpport = rbUse; }
+    void setFullWPGSupport(bool bUse) { m_bFullWPGSUpport = bUse; }
 
     bool isWordProcessingGroupShape() const { return mxWpgContext ? true : false; }
 
diff --git a/include/sfx2/thumbnailview.hxx b/include/sfx2/thumbnailview.hxx
index bbdee870ac52..453f3c9c5b9b 100644
--- a/include/sfx2/thumbnailview.hxx
+++ b/include/sfx2/thumbnailview.hxx
@@ -254,7 +254,7 @@ protected:
 
     virtual css::uno::Reference< css::accessibility::XAccessible > CreateAccessible() override;
 
-    css::uno::Reference<css::accessibility::XAccessible> getAccessible() const;
+    const css::uno::Reference<css::accessibility::XAccessible> & getAccessible() const;
 
 protected:
 
diff --git a/include/sfx2/weldutils.hxx b/include/sfx2/weldutils.hxx
index aaa2fe08a2e3..8f230cee5283 100644
--- a/include/sfx2/weldutils.hxx
+++ b/include/sfx2/weldutils.hxx
@@ -56,7 +56,7 @@ public:
     css::uno::Reference<css::frame::XToolbarController>
     GetControllerForCommand(const OUString& rCommand) const;
 
-    css::uno::Reference<css::frame::XFrame> GetFrame() const { return m_xFrame; }
+    const css::uno::Reference<css::frame::XFrame>& GetFrame() const { return m_xFrame; }
 
     void dispose();
     ~ToolbarUnoDispatcher();
diff --git a/include/svtools/embedhlp.hxx b/include/svtools/embedhlp.hxx
index 9ba2a0166c2b..9d4cb8e85c39 100644
--- a/include/svtools/embedhlp.hxx
+++ b/include/svtools/embedhlp.hxx
@@ -110,7 +110,7 @@ public:
     bool IsLocked() const;
 
     void SetIsProtectedHdl(const Link<LinkParamNone*, bool>& rProtectedHdl);
-    Link<LinkParamNone*, bool> GetIsProtectedHdl() const;
+    const Link<LinkParamNone*, bool> & GetIsProtectedHdl() const;
 
     bool IsChart() const;
 
diff --git a/include/svx/colorbox.hxx b/include/svx/colorbox.hxx
index 0dc858d1e67d..3775fc187fd2 100644
--- a/include/svx/colorbox.hxx
+++ b/include/svx/colorbox.hxx
@@ -62,7 +62,7 @@ public:
 
     Color const& GetSelectEntryColor() const { return m_aSelectedColor.m_aColor; }
     NamedColor GetSelectedEntry() const { return m_aSelectedColor.ToNamedColor(); }
-    svx::NamedThemedColor GetSelectedEntryThemedColor() const { return m_aSelectedColor; }
+    const svx::NamedThemedColor& GetSelectedEntryThemedColor() const { return m_aSelectedColor; }
 
     void SelectEntry(const NamedColor& rColor);
     void SelectEntry(const Color& rColor);
diff --git a/include/svx/sxmtpitm.hxx b/include/svx/sxmtpitm.hxx
index 2445909e2fd4..60e17d445d61 100644
--- a/include/svx/sxmtpitm.hxx
+++ b/include/svx/sxmtpitm.hxx
@@ -37,7 +37,7 @@ public:
     virtual bool QueryValue( css::uno::Any& rVal, sal_uInt8 nMemberId = 0 ) const override;
     virtual bool PutValue( const css::uno::Any& rVal, sal_uInt8 nMemberId ) override;
 
-    static OUString GetValueTextByPos(sal_uInt16 nPos);
+    static const OUString & GetValueTextByPos(sal_uInt16 nPos);
     virtual bool GetPresentation(SfxItemPresentation ePres, MapUnit eCoreMetric, MapUnit ePresMetric, OUString& rText, const IntlWrapper&) const override;
 };
 
diff --git a/include/vcl/graph.hxx b/include/vcl/graph.hxx
index abff7521381f..c97ee23d41c1 100644
--- a/include/vcl/graph.hxx
+++ b/include/vcl/graph.hxx
@@ -189,7 +189,7 @@ public:
     /// Get the page number of the multi-page source this Graphic is rendered from.
     sal_Int32 getPageNumber() const;
 
-    static css::uno::Sequence<sal_Int8> getUnoTunnelId();
+    static const css::uno::Sequence<sal_Int8> & getUnoTunnelId();
 };
 
 namespace std {
diff --git a/oox/source/export/chartexport.cxx b/oox/source/export/chartexport.cxx
index dde654497cf8..1d6dfec23f71 100644
--- a/oox/source/export/chartexport.cxx
+++ b/oox/source/export/chartexport.cxx
@@ -503,7 +503,7 @@ bool DataLabelsRange::hasLabel(sal_Int32 nIndex) const
     return maLabels.find(nIndex) != maLabels.end();
 }
 
-OUString DataLabelsRange::getRange() const
+const OUString & DataLabelsRange::getRange() const
 {
     return maRange;
 }
diff --git a/oox/source/shape/WpgContext.hxx b/oox/source/shape/WpgContext.hxx
index 414e5f819bfe..643a2a49357b 100644
--- a/oox/source/shape/WpgContext.hxx
+++ b/oox/source/shape/WpgContext.hxx
@@ -29,7 +29,7 @@ public:
     const oox::drawingml::ShapePtr& getShape() const { return mpShape; }
 
     const bool& isFullWPGSupport() const { return m_bFullWPGSupport; };
-    void setFullWPGSupport(const bool& rbUse) { m_bFullWPGSupport = rbUse; };
+    void setFullWPGSupport(bool bUse) { m_bFullWPGSupport = bUse; };
 
 private:
     oox::drawingml::ShapePtr mpShape;
diff --git a/package/inc/ZipPackage.hxx b/package/inc/ZipPackage.hxx
index 729d025e089d..e6cf614ad503 100644
--- a/package/inc/ZipPackage.hxx
+++ b/package/inc/ZipPackage.hxx
@@ -147,7 +147,7 @@ public:
     // XUnoTunnel
     virtual sal_Int64 SAL_CALL getSomething( const css::uno::Sequence< sal_Int8 >& aIdentifier ) override;
     /// @throws css::uno::RuntimeException
-    static css::uno::Sequence < sal_Int8 > getUnoTunnelId();
+    static const css::uno::Sequence < sal_Int8 > & getUnoTunnelId();
     // XPropertySet
     virtual css::uno::Reference< css::beans::XPropertySetInfo > SAL_CALL getPropertySetInfo(  ) override;
     virtual void SAL_CALL setPropertyValue( const OUString& aPropertyName, const css::uno::Any& aValue ) override;
diff --git a/package/inc/ZipPackageFolder.hxx b/package/inc/ZipPackageFolder.hxx
index 21ff8343c252..82582293158f 100644
--- a/package/inc/ZipPackageFolder.hxx
+++ b/package/inc/ZipPackageFolder.hxx
@@ -91,7 +91,7 @@ public:
 
     ZipContentInfo& doGetByName( const OUString& aName );
 
-    static css::uno::Sequence < sal_Int8 > getUnoTunnelId();
+    static const css::uno::Sequence < sal_Int8 > & getUnoTunnelId();
 
     void setPackageFormat_Impl( sal_Int32 nFormat ) { m_nFormat = nFormat; }
     void setRemoveOnInsertMode_Impl( bool bRemove ) { mbAllowRemoveOnInsert = bRemove; }
diff --git a/package/inc/ZipPackageStream.hxx b/package/inc/ZipPackageStream.hxx
index 20ee2cab7275..aa150717474d 100644
--- a/package/inc/ZipPackageStream.hxx
+++ b/package/inc/ZipPackageStream.hxx
@@ -137,7 +137,7 @@ public:
     void setZipEntryOnLoading( const ZipEntry &rInEntry);
     void successfullyWritten( ZipEntry const *pEntry );
 
-    static css::uno::Sequence < sal_Int8 > getUnoTunnelId();
+    static const css::uno::Sequence < sal_Int8 > & getUnoTunnelId();
 
     // XActiveDataSink
     virtual void SAL_CALL setInputStream( const css::uno::Reference< css::io::XInputStream >& aStream ) override;
diff --git a/package/source/zippackage/ZipPackage.cxx b/package/source/zippackage/ZipPackage.cxx
index e00c47d10a5f..c134a9d94c5d 100644
--- a/package/source/zippackage/ZipPackage.cxx
+++ b/package/source/zippackage/ZipPackage.cxx
@@ -1661,7 +1661,7 @@ sal_Bool SAL_CALL ZipPackage::supportsService( OUString const & rServiceName )
     return cppu::supportsService(this, rServiceName);
 }
 
-Sequence< sal_Int8 > ZipPackage::getUnoTunnelId()
+const Sequence< sal_Int8 > & ZipPackage::getUnoTunnelId()
 {
     static const comphelper::UnoIdInit implId;
     return implId.getSeq();
diff --git a/package/source/zippackage/ZipPackageFolder.cxx b/package/source/zippackage/ZipPackageFolder.cxx
index b65c9c697788..118ec39923c0 100644
--- a/package/source/zippackage/ZipPackageFolder.cxx
+++ b/package/source/zippackage/ZipPackageFolder.cxx
@@ -143,7 +143,7 @@ void ZipPackageFolder::setChildStreamsTypeByExtension( const beans::StringPair&
     }
 }
 
-css::uno::Sequence < sal_Int8 > ZipPackageFolder::getUnoTunnelId()
+const css::uno::Sequence < sal_Int8 > & ZipPackageFolder::getUnoTunnelId()
 {
     static const comphelper::UnoIdInit lcl_CachedImplId;
     return lcl_CachedImplId.getSeq();
diff --git a/package/source/zippackage/ZipPackageStream.cxx b/package/source/zippackage/ZipPackageStream.cxx
index b8157839bbba..f2ec696b5cc8 100644
--- a/package/source/zippackage/ZipPackageStream.cxx
+++ b/package/source/zippackage/ZipPackageStream.cxx
@@ -71,7 +71,7 @@ using namespace cppu;
 #define THROW_WHERE ""
 #endif
 
-css::uno::Sequence < sal_Int8 > ZipPackageStream::getUnoTunnelId()
+const css::uno::Sequence < sal_Int8 > & ZipPackageStream::getUnoTunnelId()
 {
     static const comphelper::UnoIdInit lcl_CachedImplId;
     return lcl_CachedImplId.getSeq();
diff --git a/reportdesign/inc/ReportDefinition.hxx b/reportdesign/inc/ReportDefinition.hxx
index 50973000d493..33d7cd2d8dee 100644
--- a/reportdesign/inc/ReportDefinition.hxx
+++ b/reportdesign/inc/ReportDefinition.hxx
@@ -188,7 +188,7 @@ namespace reportdesign
 
     public:
         //TTTT Needed? Or same as above?
-        static css::uno::Sequence< sal_Int8 > getUnoTunnelId();
+        static const css::uno::Sequence< sal_Int8 > & getUnoTunnelId();
         static std::shared_ptr<rptui::OReportModel> getSdrModel(const css::uno::Reference< css::report::XReportDefinition >& _xReportDefinition);
 
     private:
diff --git a/reportdesign/source/core/api/ReportDefinition.cxx b/reportdesign/source/core/api/ReportDefinition.cxx
index 9954b50c359e..b74ded0d9b32 100644
--- a/reportdesign/source/core/api/ReportDefinition.cxx
+++ b/reportdesign/source/core/api/ReportDefinition.cxx
@@ -1959,7 +1959,7 @@ uno::Sequence< sal_Int8 > SAL_CALL OReportDefinition::getImplementationId(  )
     return css::uno::Sequence<sal_Int8>();
 }
 
-uno::Sequence< sal_Int8 > OReportDefinition::getUnoTunnelId()
+const uno::Sequence< sal_Int8 > & OReportDefinition::getUnoTunnelId()
 {
     static const comphelper::UnoIdInit implId;
     return implId.getSeq();
diff --git a/reportdesign/source/core/api/Section.cxx b/reportdesign/source/core/api/Section.cxx
index 62795c756ab2..d0e40aff411b 100644
--- a/reportdesign/source/core/api/Section.cxx
+++ b/reportdesign/source/core/api/Section.cxx
@@ -570,7 +570,7 @@ sal_Int64 OSection::getSomething( const uno::Sequence< sal_Int8 > & rId )
     return (m_xDrawPage_Tunnel.is()) ? m_xDrawPage_Tunnel->getSomething(rId) : 0;
 }
 
-uno::Sequence< sal_Int8 > OSection::getUnoTunnelId()
+const uno::Sequence< sal_Int8 > & OSection::getUnoTunnelId()
 {
     static const comphelper::UnoIdInit implId;
     return implId.getSeq();
diff --git a/reportdesign/source/core/inc/Section.hxx b/reportdesign/source/core/inc/Section.hxx
index b5a18dfdf3e5..7afbf9e91d0f 100644
--- a/reportdesign/source/core/inc/Section.hxx
+++ b/reportdesign/source/core/inc/Section.hxx
@@ -221,7 +221,7 @@ namespace reportdesign
 
         // css::lang::XUnoTunnel
         virtual sal_Int64 SAL_CALL getSomething( const css::uno::Sequence< sal_Int8 >& aIdentifier ) override;
-        static css::uno::Sequence< sal_Int8 > getUnoTunnelId();
+        static const css::uno::Sequence< sal_Int8 > & getUnoTunnelId();
 
         void notifyElementAdded(const css::uno::Reference< css::drawing::XShape >& xShape);
         void notifyElementRemoved(const css::uno::Reference< css::drawing::XShape >& xShape);
diff --git a/sc/source/filter/inc/SparklineFragment.hxx b/sc/source/filter/inc/SparklineFragment.hxx
index d6e123036816..6ed4bad49bc5 100644
--- a/sc/source/filter/inc/SparklineFragment.hxx
+++ b/sc/source/filter/inc/SparklineFragment.hxx
@@ -44,7 +44,7 @@ public:
     {
     }
 
-    std::shared_ptr<sc::SparklineGroup> getSparklineGroup() { return m_pSparklineGroup; }
+    const std::shared_ptr<sc::SparklineGroup>& getSparklineGroup() { return m_pSparklineGroup; }
 
     std::vector<Sparkline>& getSparklines() { return m_aSparklines; }
 };
diff --git a/sd/source/ui/inc/tools/GraphicSizeCheck.hxx b/sd/source/ui/inc/tools/GraphicSizeCheck.hxx
index ea0faf0178d0..44f78e4eb159 100644
--- a/sd/source/ui/inc/tools/GraphicSizeCheck.hxx
+++ b/sd/source/ui/inc/tools/GraphicSizeCheck.hxx
@@ -36,7 +36,7 @@ public:
     GraphicSizeViolation(sal_Int32 nDPI, SdrGrafObj* pGraphicObject);
     bool check();
 
-    OUString getGraphicName();
+    const OUString& getGraphicName();
 
     SdrGrafObj* getObject() const { return m_pGraphicObject; }
 
diff --git a/sd/source/ui/tools/GraphicSizeCheck.cxx b/sd/source/ui/tools/GraphicSizeCheck.cxx
index b9456d7c28a7..492a2d70b23e 100644
--- a/sd/source/ui/tools/GraphicSizeCheck.cxx
+++ b/sd/source/ui/tools/GraphicSizeCheck.cxx
@@ -111,7 +111,7 @@ bool GraphicSizeViolation::check()
     return isDPITooLow() || isDPITooHigh();
 }
 
-OUString GraphicSizeViolation::getGraphicName() { return m_pGraphicObject->GetName(); }
+const OUString& GraphicSizeViolation::getGraphicName() { return m_pGraphicObject->GetName(); }
 
 namespace
 {
diff --git a/sfx2/source/control/thumbnailview.cxx b/sfx2/source/control/thumbnailview.cxx
index 3e85c4c911fc..a678df5b18ac 100644
--- a/sfx2/source/control/thumbnailview.cxx
+++ b/sfx2/source/control/thumbnailview.cxx
@@ -328,7 +328,7 @@ css::uno::Reference< css::accessibility::XAccessible > ThumbnailView::CreateAcce
     return mxAccessible;
 }
 
-css::uno::Reference< css::accessibility::XAccessible > ThumbnailView::getAccessible() const
+const css::uno::Reference< css::accessibility::XAccessible > & ThumbnailView::getAccessible() const
 {
     return mxAccessible;
 }
diff --git a/svtools/source/misc/embedhlp.cxx b/svtools/source/misc/embedhlp.cxx
index 6e56dc3137e8..f384eb352f90 100644
--- a/svtools/source/misc/embedhlp.cxx
+++ b/svtools/source/misc/embedhlp.cxx
@@ -440,7 +440,7 @@ void EmbeddedObjectRef::SetIsProtectedHdl(const Link<LinkParamNone*, bool>& rPro
     mpImpl->m_aIsProtectedHdl = rProtectedHdl;
 }
 
-Link<LinkParamNone*, bool> EmbeddedObjectRef::GetIsProtectedHdl() const
+const Link<LinkParamNone*, bool> & EmbeddedObjectRef::GetIsProtectedHdl() const
 {
     return mpImpl->m_aIsProtectedHdl;
 }
diff --git a/svx/source/svdraw/svdattr.cxx b/svx/source/svdraw/svdattr.cxx
index da041583f4c9..920b38882024 100644
--- a/svx/source/svdraw/svdattr.cxx
+++ b/svx/source/svdraw/svdattr.cxx
@@ -1601,7 +1601,7 @@ SdrMeasureTextHPosItem* SdrMeasureTextHPosItem::Clone(SfxItemPool* /*pPool*/) co
 
 sal_uInt16 SdrMeasureTextHPosItem::GetValueCount() const { return 4; }
 
-OUString SdrMeasureTextHPosItem::GetValueTextByPos(sal_uInt16 nPos)
+const OUString & SdrMeasureTextHPosItem::GetValueTextByPos(sal_uInt16 nPos)
 {
     static std::array<OUString, 4> aMeasureTextHPosItem
     {
diff --git a/sw/inc/expfld.hxx b/sw/inc/expfld.hxx
index d241c9adb665..92ef8136dcde 100644
--- a/sw/inc/expfld.hxx
+++ b/sw/inc/expfld.hxx
@@ -319,7 +319,7 @@ public:
     void applyFieldContent( const OUString& rNewFieldContent );
 
     bool isFormField() const;
-    css::uno::Sequence<css::beans::PropertyValue> getGrabBagParams() const { return maGrabBag; }
+    const css::uno::Sequence<css::beans::PropertyValue> & getGrabBagParams() const { return maGrabBag; }
 
     virtual OUString        GetFieldName() const override;
 
diff --git a/sw/inc/fldbas.hxx b/sw/inc/fldbas.hxx
index 5a256cb1884d..21a2c1000c0c 100644
--- a/sw/inc/fldbas.hxx
+++ b/sw/inc/fldbas.hxx
@@ -391,7 +391,7 @@ public:
     /// Is this field clickable?
     bool IsClickable() const;
     virtual void dumpAsXml(xmlTextWriterPtr pWriter) const;
-    OUString GetTitle() const { return m_aTitle; }
+    const OUString & GetTitle() const { return m_aTitle; }
     void SetTitle(const OUString& rTitle) { m_aTitle = rTitle; }
 };
 
diff --git a/sw/inc/formatcontentcontrol.hxx b/sw/inc/formatcontentcontrol.hxx
index ba29a6825523..bb92454ffd09 100644
--- a/sw/inc/formatcontentcontrol.hxx
+++ b/sw/inc/formatcontentcontrol.hxx
@@ -91,7 +91,7 @@ public:
 
     void NotifyChangeTextNode(SwTextNode* pTextNode);
 
-    css::uno::WeakReference<css::text::XTextContent> GetXContentControl() const
+    const css::uno::WeakReference<css::text::XTextContent>& GetXContentControl() const
     {
         return m_wXContentControl;
     }
diff --git a/sw/inc/frmfmt.hxx b/sw/inc/frmfmt.hxx
index 4a5f2f1e8e87..bc0944fa39fe 100644
--- a/sw/inc/frmfmt.hxx
+++ b/sw/inc/frmfmt.hxx
@@ -223,7 +223,7 @@ public:
     OUString GetObjTitle() const;
     void SetObjTitle( const OUString& rTitle, bool bBroadcast = false );
 
-    OUString GetObjTooltip() const;
+    const OUString & GetObjTooltip() const;
     void SetObjTooltip(const OUString& rTooltip);
 
     OUString GetObjDescription() const;
diff --git a/sw/source/core/graphic/GraphicSizeCheck.cxx b/sw/source/core/graphic/GraphicSizeCheck.cxx
index d01436e3fb6b..9fe2de879777 100644
--- a/sw/source/core/graphic/GraphicSizeCheck.cxx
+++ b/sw/source/core/graphic/GraphicSizeCheck.cxx
@@ -54,7 +54,7 @@ bool GraphicSizeViolation::check()
     return isDPITooLow() || isDPITooHigh();
 }
 
-OUString GraphicSizeViolation::getGraphicName()
+const OUString& GraphicSizeViolation::getGraphicName()
 {
     return m_pGraphicNode->GetFlyFormat()->GetName();
 }
diff --git a/sw/source/core/inc/GraphicSizeCheck.hxx b/sw/source/core/inc/GraphicSizeCheck.hxx
index 983d549734fe..a70b1c756d66 100644
--- a/sw/source/core/inc/GraphicSizeCheck.hxx
+++ b/sw/source/core/inc/GraphicSizeCheck.hxx
@@ -34,7 +34,7 @@ public:
     GraphicSizeViolation(sal_Int32 nDPI, const SwGrfNode* pGraphicNode);
     bool check();
 
-    OUString getGraphicName();
+    const OUString& getGraphicName();
 
     bool isDPITooLow() { return m_nDPIX < m_nLowDPILimit || m_nDPIY < m_nLowDPILimit; }
 
diff --git a/sw/source/core/inc/unocontentcontrol.hxx b/sw/source/core/inc/unocontentcontrol.hxx
index 631ccdaf02d3..29f9d5168ba5 100644
--- a/sw/source/core/inc/unocontentcontrol.hxx
+++ b/sw/source/core/inc/unocontentcontrol.hxx
@@ -81,7 +81,7 @@ public:
 
     /// Initializes params with position of the attribute content (without CH_TXTATR).
     bool SetContentRange(SwTextNode*& rpNode, sal_Int32& rStart, sal_Int32& rEnd) const;
-    css::uno::Reference<css::text::XText> GetParentText() const;
+    const css::uno::Reference<css::text::XText>& GetParentText() const;
 
     bool CheckForOwnMemberContentControl(const SwPaM& rPam, const bool bAbsorb);
 
diff --git a/sw/source/core/layout/atrfrm.cxx b/sw/source/core/layout/atrfrm.cxx
index 7db55da058d0..cf8d93ac3acf 100644
--- a/sw/source/core/layout/atrfrm.cxx
+++ b/sw/source/core/layout/atrfrm.cxx
@@ -3195,7 +3195,7 @@ void SwFlyFrameFormat::SetObjTooltip(const OUString& rTooltip)
     msTooltip = rTooltip;
 }
 
-OUString SwFlyFrameFormat::GetObjTooltip() const
+const OUString & SwFlyFrameFormat::GetObjTooltip() const
 {
     return msTooltip;
 }
diff --git a/sw/source/core/unocore/unocontentcontrol.cxx b/sw/source/core/unocore/unocontentcontrol.cxx
index bcd3be6de895..93b7c976ae0d 100644
--- a/sw/source/core/unocore/unocontentcontrol.cxx
+++ b/sw/source/core/unocore/unocontentcontrol.cxx
@@ -208,7 +208,7 @@ void SwXContentControl::Impl::Notify(const SfxHint& rHint)
     m_EventListeners.disposeAndClear(aGuard, aEvent);
 }
 
-uno::Reference<text::XText> SwXContentControl::GetParentText() const
+const uno::Reference<text::XText>& SwXContentControl::GetParentText() const
 {
     return m_pImpl->m_xParentText;
 }
diff --git a/sw/source/uibase/inc/break.hxx b/sw/source/uibase/inc/break.hxx
index 3dbb4c681039..79cf295eb353 100644
--- a/sw/source/uibase/inc/break.hxx
+++ b/sw/source/uibase/inc/break.hxx
@@ -61,7 +61,7 @@ public:
     const OUString& GetTemplateName() const { return m_aTemplate; }
     sal_uInt16 GetKind() const { return nKind; }
     const ::std::optional<sal_uInt16>& GetPageNumber() const { return oPgNum; }
-    std::optional<SwLineBreakClear> GetClear() const { return m_eClear; }
+    const std::optional<SwLineBreakClear>& GetClear() const { return m_eClear; }
 };
 
 #endif
diff --git a/toolkit/source/controls/grid/gridcolumn.cxx b/toolkit/source/controls/grid/gridcolumn.cxx
index 0db9b50a5d75..11a03e647236 100644
--- a/toolkit/source/controls/grid/gridcolumn.cxx
+++ b/toolkit/source/controls/grid/gridcolumn.cxx
@@ -282,7 +282,7 @@ namespace toolkit
     }
 
 
-    Sequence< sal_Int8 > GridColumn::getUnoTunnelId() noexcept
+    const Sequence< sal_Int8 > & GridColumn::getUnoTunnelId() noexcept
     {
         static const comphelper::UnoIdInit aId;
         return aId.getSeq();
diff --git a/toolkit/source/controls/grid/gridcolumn.hxx b/toolkit/source/controls/grid/gridcolumn.hxx
index cd3a8c5cd531..3f082f63c9c5 100644
--- a/toolkit/source/controls/grid/gridcolumn.hxx
+++ b/toolkit/source/controls/grid/gridcolumn.hxx
@@ -80,7 +80,7 @@ public:
 
     // XUnoTunnel and friends
     virtual sal_Int64 SAL_CALL getSomething( const css::uno::Sequence< sal_Int8 >& i_identifier ) override;
-    static css::uno::Sequence< sal_Int8 > getUnoTunnelId() noexcept;
+    static const css::uno::Sequence< sal_Int8 > & getUnoTunnelId() noexcept;
 
     // attribute access
     void setIndex( sal_Int32 const i_index );
diff --git a/ucb/source/ucp/webdav-curl/DAVResourceAccess.hxx b/ucb/source/ucp/webdav-curl/DAVResourceAccess.hxx
index df27713a936d..0e5231934e5d 100644
--- a/ucb/source/ucp/webdav-curl/DAVResourceAccess.hxx
+++ b/ucb/source/ucp/webdav-curl/DAVResourceAccess.hxx
@@ -73,7 +73,7 @@ public:
 
     const OUString & getURL() const { return m_aURL; }
 
-    rtl::Reference< DAVSessionFactory > getSessionFactory() const
+    const rtl::Reference< DAVSessionFactory > & getSessionFactory() const
     { return m_xSessionFactory; }
 
     // DAV methods
diff --git a/vcl/source/gdi/graph.cxx b/vcl/source/gdi/graph.cxx
index 7141e2e2cb4f..c56ddb7204eb 100644
--- a/vcl/source/gdi/graph.cxx
+++ b/vcl/source/gdi/graph.cxx
@@ -556,7 +556,7 @@ OString Graphic::getUniqueID() const
     return aUniqueString;
 }
 
-css::uno::Sequence<sal_Int8> Graphic::getUnoTunnelId() {
+const css::uno::Sequence<sal_Int8> & Graphic::getUnoTunnelId() {
     static const comphelper::UnoIdInit gId;
     return gId.getSeq();
 }
diff --git a/xmlsecurity/source/xmlsec/xmlelementwrapper_xmlsecimpl.cxx b/xmlsecurity/source/xmlsec/xmlelementwrapper_xmlsecimpl.cxx
index 9de3930731ab..9104966185ea 100644
--- a/xmlsecurity/source/xmlsec/xmlelementwrapper_xmlsecimpl.cxx
+++ b/xmlsecurity/source/xmlsec/xmlelementwrapper_xmlsecimpl.cxx
@@ -33,7 +33,7 @@ XMLElementWrapper_XmlSecImpl::XMLElementWrapper_XmlSecImpl(const xmlNodePtr pNod
 }
 
 /* XUnoTunnel */
-uno::Sequence< sal_Int8 > XMLElementWrapper_XmlSecImpl::getUnoTunnelId()
+const uno::Sequence< sal_Int8 > & XMLElementWrapper_XmlSecImpl::getUnoTunnelId()
 {
     static const comphelper::UnoIdInit implId;
     return implId.getSeq();
diff --git a/xmlsecurity/source/xmlsec/xmlelementwrapper_xmlsecimpl.hxx b/xmlsecurity/source/xmlsec/xmlelementwrapper_xmlsecimpl.hxx
index 4e3f44527d62..de833d25a139 100644
--- a/xmlsecurity/source/xmlsec/xmlelementwrapper_xmlsecimpl.hxx
+++ b/xmlsecurity/source/xmlsec/xmlelementwrapper_xmlsecimpl.hxx
@@ -55,7 +55,7 @@ public:
     /* css::lang::XUnoTunnel */
     virtual sal_Int64 SAL_CALL getSomething( const css::uno::Sequence< sal_Int8 >& aIdentifier ) override;
     /// @throws css::uno::RuntimeException
-    static css::uno::Sequence < sal_Int8 > getUnoTunnelId();
+    static const css::uno::Sequence < sal_Int8 > & getUnoTunnelId();
 
     /* css::lang::XServiceInfo */
     virtual OUString SAL_CALL getImplementationName(  ) override;