Implemented for Internal and External classes. Not implemented for System classes.
classref ← objref.⎕PARENT classref ← classref.⎕PARENT classref ← ⎕PARENT (Within user-defined method, same as ⎕THIS.⎕PARENT)
The niladic system method ⎕PARENT returns a reference to the parent class of either an object, or a class. The result is always a class reference, or the Null object if there is no parent. It is a synonym for ⎕BASE.