Where Used List (Class) for SAP ABAP Data Element PAK_OBJECT_SUB_KEY (Together with TADIR key, identifies objects for package API)

#	Object Type	Object Name	Object Description	Package	Structure Package	Software Component

1	Class	CL_GET_ENVIRONMENT_FOR_USE	Get The Environment for the Usage of a Dev. Object	SPAK_OBJECTS	BASIS	SAP_BASIS
2	Class	CL_PAK_WB_UTIL	Package API utilities	SPAK_WB_FOUNDATION	BASIS	SAP_BASIS
3	Class	CX_CLS_CIRCULAR_LINK_REF	Cirular link chain detected (at &1 &2 &3 &4).	SPAK_API_CLASSIFICATION	BASIS	SAP_BASIS
4	Class	CX_CLS_INVALID_ASSIGNMENT_DATA	Invalid Classification	SPAK_API_CLASSIFICATION	BASIS	SAP_BASIS