SAP ABAP Program LDRVNFB1 (form build_tree) is using

• Class (6)
• Data Element (2)
• Table/Structure Field (2)
• Message Class (1)
• Message Number (1)
• Class Method (5)
• Table (4)

#	Object Type	Object Name	Object Description	Note
1	Data Element	CHAR1	Single-Character Flag
2	Data Element	LVC_NKEY	ALV Tree Control: Node Key