SAP ABAP Class CL_DOCUMENT_HISTORY (Document Viewer) is using

• Class (139)
• Data Element (16)
• Table/Structure Field (143)
• Function Module (12)
• Interface (1)
• Message Class (8)
• Message Number (10)
• Class Method (160)
• Program (4)
• Table (40)
• Transaction Code (1)

#	Object Type	Object Name	Object Description	Note
1	Interface	IF_ECL_LAYER	Layer Interface for ECL Viewer