def verify(self, obj):
        """Verify that the object conforms to this verifier's schema

        Args:
            obj (object): A python object to verify

        Raises:
            ValidationError: If there is a problem verifying the dictionary, a
                ValidationError is thrown with at least the reason key set indicating
                the reason for the lack of validation.
        """

        if obj is not None:
            raise ValidationError("Object is not None",
                                  reason='%s is not None' % str(obj), object=obj)

        return obj