def METHOD_NAME(self):
    """
    Saves the settings to the persistent settings file.
    """
    # save the settings
    LocalConfig.instance().saveSectionSettings(self.__class__.__name__, self._settings)
    server_settings = {}
    if self._settings["vpcs_path"]:
        # save some settings to the server config file
        server_settings["vpcs_path"] = os.path.normpath(self._settings["vpcs_path"])
    config = LocalServerConfig.instance()
    config.saveSettings(self.__class__.__name__, server_settings)