Method: GET_INSTANCE
Method: DELETE_ITEM
Method: ADD_ITEM
Method: SET_QUANTITY
Method: SET_MAT_DATA
Method: GET_QUANTITY
Method: GET_MAT_DATA
Method: SET_LEAD_SELECTION
Method: REORDER_ITEMS
Method: GET_LIST
Method: CHANGE_MATERIAL_QUANTITY
Method: COUNT_ITEMS
Method: IF_FPM_GUIBB_LIST~PROCESS_EVENT
Method: IF_FPM_GUIBB_LIST~GET_DATA
Method: IF_FPM_GUIBB_LIST~FLUSH
Method: IF_FPM_GUIBB_FORM~GET_DATA