Method: GET_INSTANCE
Method: GET_ALV_STRUCTURE
Method: RETRIEVE_DETAIL_DATA
Method: SET_FC_WD
Method: SET_CURRENT_VERSION
Method: CREATE_ITEM
Method: FREE
Method: SET_ALV_CONFIG_TABLE
Method: CREATE_CP
Method: MODIFY_ALV
Method: RETRIEVE_OVERVIEW_DATA
Method: SWITCH_TO_PARENT_EDIT_MODE
Method: GET_NAME_VALUE_LIST
Method: CHECK_MANDATORY_FIELDS