question: private void saveNestedVariables ( ) { if ( nestedVars != null ) { Iterator < String > iter = nestedVars . iterator ( ) ; while ( iter . hasNext ( ) ) { String varName = iter . next ( ) ; varName = findAlias ( varName ) ; Object obj = invokingJspCtxt . getAttribute ( varName ) ; if ( obj != null ) { originalNestedVars . put ( varName , obj ) ; } } } }
target:  Saves the values of any NESTED variables that are present in the invoking JSP context, so they can later be restored.