https://doc.servo.org/crossbeam_channel/struct.TryIter.html
TryIter in crossbeam_channel - Rust
A non-blocking iterator over messages in a channel.
tryitercrossbeamchannelrust
https://doc.rust-lang.org/beta/std/sync/mpsc/struct.TryIter.html
TryIter in std::sync::mpsc - Rust
An iterator that attempts to yield all pending values for a `Receiver`, created by `try_iter`.
tryiterstdsyncmpscrust