def save(self, filepath):
        """Save current configuration to file.

        :param str filepath: Path to file where settings will be saved.
        :raises: ValueError if supplied filepath cannot be written to.
        """
        self._config.add_section("RetryPolicy")
        self._config.set("RetryPolicy", "retries", str(self.retry_policy.retries))
        self._config.set("RetryPolicy", "backoff_factor",
                         str(self.retry_policy.backoff_factor))
        self._config.set("RetryPolicy", "max_backoff",
                         str(self.retry_policy.max_backoff))
        super(RequestHTTPSenderConfiguration, self).save(filepath)
Save current configuration to file.

        :param str filepath: Path to file where settings will be saved.
        :raises: ValueError if supplied filepath cannot be written to.