Macro buffered_channel 

macro_rules! buffered_channel {
    () => { ... };
    (if { $($p:tt)* } else { $($n:tt)* }) => { ... };
    ($($p:tt)*) => { ... };
}

Indicates the BufferedChannel type is available.

This macro passes the provided code because #[cfg(feature = "buffered_channel")] is currently active.