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Changes between Initial Version and Version 1 of Ticket #28999, comment 3

-              initial
+              v1
             def __hash__(self):
                 return hash(cls)  # Class' 'view function' hash is defined by the Class
+            def __eq__(self, other):
+                if not hasattr(other, '__hash__'):
+                    return False
+                return hash(self) == hash(other)
         view = callable_view()
         view.view_class = cls