return oldMap.size( ) >= newMap.size( );
if ( newMap.size( ) > oldMap.size( ) ) return false;  Iterator it = newMap.keySet( ).iterator( ); while( it.hasNext( ) ) { Object key = it.next( ); Object oldObj = oldMap.get( key ); Object newObj = newMap.get( key ); if ( oldObj != null ) { if( isTwoExpressionEqual((IBaseExpression)newObj, (IBaseExpression)oldObj) ) return false; }else { return false; } } return true;
	private static boolean isCompatibleRSMap( Map oldMap, Map newMap )	{		if ( oldMap == newMap )			return true;		else if ( oldMap == null )			return newMap.size( ) == 0;		else if ( newMap == null )			return oldMap.size( ) == 0;		return oldMap.size( ) >= newMap.size( );	}