SAP ABAP Program ST20_CLASSICAL_LISTS (Include ST20_CLASSICAL_LISTS) is using

• Class (2)
• Data Element (1)
• Table/Structure Field (8)
• Message Class (1)
• Message Number (1)
• Class Method (1)
• Table (1)

#	Object Type	Object Name	Object Description	Note
1	Class	CL_GUI_SIMPLE_TREE	Simple Tree Control
2	Class	CL_TREE_CONTROL_BASE	Internal Tree Control Class