Method: SET_MT_SELECTION
Method: GET_PROJECT_ELEM_DESCRIPTION
Method: COLLAPSE
Method: COLLAPSE_ALL
Method: IDENTIFY_OBJECT
Method: COLLAPSE_SUBTREE
Method: SET_SELECTION
Method: REMOVE
Method: RESET_FILTER
Method: EXPAND_SUBTREE
Method: GET_ALL_GANTT_DATA
Method: EXPAND
Method: EXPAND_ALL
Method: ADD_ROW_IDS_TO_BUFFER
Method: ADD_RELATIONS