Type Alias BoxFuture 

pub type BoxFuture<'a, T> = Pin<Box<dyn Future<Output = T> + Send + 'a>>;

A boxed, Send future — the return type of TokenSource::get_token.

Defined locally because the driver takes no dependency on the futures crate; it is the conventional Pin<Box<dyn Future + Send>> shape.

Aliased Type

pub struct BoxFuture<'a, T> { /* private fields */ }