Type Alias BoxMaybeAsyncOnceMut 

pub type BoxMaybeAsyncOnceMut<'a, A, T = ()> = Box<dyn FnOnce(&mut A) -> Option<BoxFuture<'_, T>> + Send + 'a>;

Type alias for a boxed function that optionally returns an async future.

Aliased Type

pub struct BoxMaybeAsyncOnceMut<'a, A, T = ()>(/* private fields */);