Type Alias KpBox 

pub type KpBox<'a, R, V> = Kp<R, V, &'a R, &'a V, &'a mut R, &'a mut V, Box<dyn Fn(&'a R) -> Option<&'a V> + 'a>, Box<dyn Fn(&'a mut R) -> Option<&'a mut V> + 'a>>;

Aliased Type

pub struct KpBox<'a, R, V> { /* private fields */ }