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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def changes(self):
 """Dumber version of 'patch' method"""

        deprecation_msg = 'Model.changes will be removed in warlock v2'
        warnings.warn(deprecation_msg, DeprecationWarning, stacklevel=2)
        return copy.deepcopy(self.__dict__['changes'])