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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 _convert_to_json(self, response):
 """Converts response to JSON. If the response cannot be converted to JSON then `None` is returned. Args: response - An object of type `requests.models.Response` Returns: Response in JSON format if the response can be converted to JSON. `None` otherwise. """

        try:
            return response.json()
        except ValueError:
            logging.warning('Expected response in JSON format from {0} but the actual response text is: {1}'.format(
                response.request.url, response.text,
            ))
        return None