asio
pub struct StrandHandler<T, F, R> { // some fields omitted }
The binding Strand handler.
impl<T, F, R> Handler<R> for StrandHandler<T, F, R> where T: Send + 'static, F: FnOnce(Strand<T>, Result<R>) + Send + 'static, R: Send + 'static
fn callback(self, io: &IoService, res: Result<R>)