def get(self, key, default=None):
        """
        Retrieve the given configuration option.  Configuration
        options that can be queried this way are those that are
        specified without prefix in the paste.ini file, or which are
        specified in the '[turnstile]' section of the configuration
        file.  Returns the default value (None if not specified) if
        the given option does not exist.
        """

        return self._config.get(None, {}).get(key, default)