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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 create(self, status_callback=values.unset, unique_name=values.unset):
 """ Create a new ModelBuildInstance :param unicode status_callback: The URL we should call using a POST method to send status information to your application :param unicode unique_name: An application-defined string that uniquely identifies the new resource :returns: Newly created ModelBuildInstance :rtype: twilio.rest.autopilot.v1.assistant.model_build.ModelBuildInstance """

        data = values.of({'StatusCallback': status_callback, 'UniqueName': unique_name, })

        payload = self._version.create(
            'POST',
            self._uri,
            data=data,
        )

        return ModelBuildInstance(self._version, payload, assistant_sid=self._solution['assistant_sid'], )