SAP ABAP Class CL_AR_METRIC_HANDLER (ALV List Viewer) is using

• Class (28)
• Data Element (4)
• Table/Structure Field (19)
• Function Module (11)
• Message Class (1)
• Message Number (2)
• Class Method (23)
• Table (11)

#	Object Type	Object Name	Object Description	Note
1	Message Number	AREN - 028	Root nodes cannot be removed
2	Message Number	AREN - 033	Root nodes cannot be changed