Trait _
batbox
pub trait _ { fn spawn<T: Send + 'static, F: FnOnce() -> T + Send + 'static>( &self, f: F ) -> Receiver<T>; }
fn spawn<T: Send + 'static, F: FnOnce() -> T + Send + 'static>( &self, f: F) -> Receiver<T>
impl ThreadPoolExt for ThreadPool