pub fn from_fn_with_description<'a, F, Fut, Input, Output, Descr>(
    description: Descr,
    f: F
) -> Handler<'a, Input, Output, Descr> where
    F: Fn(Input, Cont<'a, Input, Output>) -> Fut,
    F: Send + Sync + 'a,
    Fut: Future<Output = ControlFlow<Output, Input>> + Send + 'a, 
Expand description

from_fn with a custom description.