How to use the messagebird.http_client.ResponseFormat function in messagebird

def request_store_as_file(self, path, filepath, method='GET', params=None, type=REST_TYPE):
        """Builds a request, gets a response and decodes it."""
        response_binary = self._get_http_client(type).request(path, method, params, ResponseFormat.binary)

        if not response_binary:
            return response_binary

        with io.open(filepath, 'wb') as f:
            f.write(response_binary)

        return filepath

'GET': lambda: requests.get(url, verify=True, headers=headers, params=params),
            'PATCH': lambda: requests.patch(url, verify=True, headers=headers, data=json_serialize(params)),
            'POST': lambda: requests.post(url, verify=True, headers=headers, data=json_serialize(params)),
            'PUT': lambda: requests.put(url, verify=True, headers=headers, data=json_serialize(params))
        }
        response = method_switcher.get(method, str(method) + ' is not a supported HTTP method')
        if isinstance(response, str):
            raise ValueError(response)
        response = response()

        if response.status_code not in self.__supported_status_codes:
            response.raise_for_status()

        response_switcher = {
            ResponseFormat.text: response.text,
            ResponseFormat.binary: response.content
        }
        return response_switcher.get(format)

    def request(self, path, method='GET', params=None, format=ResponseFormat.text):
        """Builds a request and gets a response."""
        if params is None:
            params = {}
        url = urljoin(self.endpoint, path)
        headers = {
            'Accept': 'application/json',
            'Authorization': 'AccessKey ' + self.access_key,
            'User-Agent': self.user_agent,
            'Content-Type': 'application/json'
        }

        method_switcher = {
            'DELETE': lambda: requests.delete(url, verify=True, headers=headers, data=json_serialize(params)),
            'GET': lambda: requests.get(url, verify=True, headers=headers, params=params),
            'PATCH': lambda: requests.patch(url, verify=True, headers=headers, data=json_serialize(params)),
            'POST': lambda: requests.post(url, verify=True, headers=headers, data=json_serialize(params)),