// parse the default file if exists, otherwise None
parse the default file if exists, otherwise None
parse the default file if exists otherwise None
pub fn from_default_file() -> Result<Option<Self>, IoError> {
        let default_cfg_file_path = build_server_config_file_path(SPU_CONFIG_FILE);
        if Path::new(&default_cfg_file_path).exists() {
            Ok(Some(SpuConfigFile::from_file(default_cfg_file_path)?))
        } else {
            Ok(None)
        }
    }
pub fn from_default_file ( ) -> Result < Option < Self > , IoError > { let default_cfg_file_path = build_server_config_file_path ( SPU_CONFIG_FILE ) ; if Path :: new ( & default_cfg_file_path ) . exists ( ) { Ok ( Some ( SpuConfigFile :: from_file ( default_cfg_file_path ) ? ) ) } else { Ok ( None ) } }
parse the default file if exists, otherwise None
parse the default file if exists otherwise None