Type Alias BoxFuture 

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

A boxed, 'static future — hand-rolled rather than pulling in the futures crate for one type alias.

Aliased Type

#[repr(transparent)]
pub struct BoxFuture<'a, T> { /* private fields */ }