SAP ABAP Class CL_O2_PAGE_STRUCTURE (O2: Page Structure in Tree Form) is using

• Class (15)
• Data Element (7)
• Table/Structure Field (15)
• Message Class (3)
• Message Number (4)
• Class Method (18)
• Table (3)

#	Object Type	Object Name	Object Description	Note
1	Table	TREEMCITEM	Column Tree Model: Item
2	Table	TREEMCITEM	Column Tree Model: Item
3	Table	TREEMHHDR	Tree Model: Attributes of the Hierarchy Heading