SAP ABAP Class CL_FDT_WD_MAINTENANCE_MODEL (FDT WD: Model for maintenance objects) is using

• Class (11)
• Table/Structure Field (2)
• Function Module (1)
• Interface (18)
• Message Class (2)
• Message Number (2)
• Class Method (17)
• Table (1)

#	Object Type	Object Name	Object Description	Note
1	Table	SYS_CALLS	Structure of System Callstack (like in the Debugger)