The <cxxVariableStorageClassSpecifierMutable> element marks this variable as mutable.
The <cxxVariableStorageClassSpecifierMutable> element has no children. <cxxVariableStorageClassSpecifierMutable> can have the fixed attributes name and value both of which are set to "mutable".
<cxxVariableDefinition>
<cxxVariableAccessSpecifier value="private"/>
<cxxVariableStorageClassSpecifierMutable/>
<cxxVariableDeclaredType>
<apiRelation href="class_t_call_back.xml#class_t_call_back">TCallBack</apiRelation>
</cxxVariableDeclaredType>
<cxxVariableScopedName>RFbsSession</cxxVariableScopedName>
<cxxVariablePrototype>TCallBack iCallBack</cxxVariablePrototype>
<cxxVariableNameLookup>RFbsSession::iCallBack</cxxVariableNameLookup>
<cxxVariableAPIItemLocation>
<cxxVariableDeclarationFile name="filePath" value="C:/src/include/fbs.h"/>
<cxxVariableDeclarationFileLine name="lineNumber" value="121"/>
</cxxVariableAPIItemLocation>
</cxxVariableDefinition>