SAP ABAP Table GRFN_S_FIELD_USAGE (UI Field Usage) is used by

• Class (3)
• TTYP (1)

#	Object Type	Object Name	Object Description	Package	Structure Package	Software Component
1	Class	CL_GRFN_CUIBB_UTIL Method: GET_DEFINITION_FROM_USAGE	Configurable UIBB Utility Class	GRFN_WD_REUSE	GRFD_MAIN	GRCFND_A
2	Class	CL_GRFN_CUIBB_UTIL Method: GET_USAGE_FROM_DEFINITION	Configurable UIBB Utility Class	GRFN_WD_REUSE	GRFD_MAIN	GRCFND_A
3	Class	CL_GRFN_EXT_LIST_FEEDER_CN Method: IF_GRFN_LIST_FEEDER~REFRESH_USAGE	Control List feeder class	GRFN_WD_REUSE	GRFD_MAIN	GRCFND_A