question: protected void changeToVarRef ( QName varName , ExpressionOwner owner , Vector paths , ElemTemplateElement psuedoVarRecipient ) { Variable varRef = ( paths == m_absPaths ) ? new VariableSafeAbsRef ( ) : new Variable ( ) ; varRef . setQName ( varName ) ; if ( paths == m_absPaths ) { StylesheetRoot root = ( StylesheetRoot ) psuedoVarRecipient ; Vector globalVars = root . getVariablesAndParamsComposed ( ) ; varRef . setIndex ( globalVars . size ( ) - 1 ) ; varRef . setIsGlobal ( true ) ; } owner . setExpression ( varRef ) ; }
target:  Change the expression owned by the owner argument to a variable reference  of the given name. Warning: For global vars, this function relies on the variable declaration  to which it refers having been added just prior to this function being called, so that the reference index can be determined from the size of the global variables  list minus one.