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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 backup_key(self, name, mount_point=DEFAULT_MOUNT_POINT):
 """Return a plaintext backup of a named key. The backup contains all the configuration data and keys of all the versions along with the HMAC key. The response from this endpoint can be used with the /restore endpoint to restore the key. Supported methods: GET: /{mount_point}/backup/{name}. Produces: 200 application/json :param name: Name of the key. :type name: str | unicode :param mount_point: The "path" the method/backend was mounted on. :type mount_point: str | unicode :return: The JSON response of the request. :rtype: requests.Response """

        api_path = '/v1/{mount_point}/backup/{name}'.format(
            mount_point=mount_point,
            name=name,
        )
        response = self._adapter.get(
            url=api_path,
        )
        return response.json()