if( instanceId != null ) { return extractByInstanceId( ); } else if( resultSetName != null )
if( resultSetName != null )
	public IExtractionResults extract( ) throws EngineException	{		if ( currentResult != null )			return currentResult;				if( instanceId != null )		{			return extractByInstanceId( );		}		else if( resultSetName != null )		{			return extractByResultSetName( );		}		return null;	}