Function bdrck::configuration::instance_apply_mut

pub fn instance_apply_mut<T: 'static, R, F: FnOnce(&mut Configuration<T>) -> R>(
    id: &Identifier,
    f: F
) -> Result<R>

instance_apply_mut is a very generic function which applies the given mutation function once to the configuration singleton matching the given identifier. It is an error if the identifier is unrecognized, or if the given callback operates on a Configuration of the wrong type.