def get_conf_key(self):
        """
        Returns a string representing the configuration keyspace prefix for this plugin.
        """
        if not self.conf_key:
            self.conf_key = self.get_conf_title().lower().replace(" ", "_")
        return self.conf_key

        Returns a string representing the configuration keyspace prefix for this plugin.
        
lemur/plugins/base/v1.py