question: gets the on message list . concode_field_sep List<List<Object>> onErrorList concode_elem_sep List<List<Object>> onOpenList concode_elem_sep List<List<Object>> onCloseList concode_elem_sep List<List<Object>> onMessageList concode_field_sep List<List<Object>> getOnErrorList concode_elem_sep void onClose concode_elem_sep void onError concode_elem_sep void onOpen concode_elem_sep void onMessage concode_elem_sep List<List<Object>> getOnCloseList concode_elem_sep List<List<Object>> getOnOpenList
target: List < List < Object >> function ( ) { return onMessageList ; }