code: def _as_json(self, response):
          
          # Assume ClientResponse has "body", and otherwise it's a requests.Response
          content = response.text() if hasattr(response, "body") else response.text
          try:
              return json.loads(content)
          except ValueError:
              raise DeserializationError(
                  "Error occurred in deserializing the response body.")
docs: Assuming this is not empty, return the content as JSON.
  
          Result/exceptions is not determined if you call this method without testing _is_empty.
  
          :raises: DeserializationError if response body contains invalid json data.