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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 returns(self):
 """The return type for this method in a JSON-compatible format. This handles the special case of ``None`` which allows ``type(None)`` also. :rtype: str | None """

        return_type = self.signature.return_type
        none_type = type(None)
        if return_type is not None and return_type is not none_type:
            return return_type.__name__