22 pub struct Layered<L, I, S = I> {  struct
28     /// If this is also a `Layer`, then this `Layered` will implement `Layer`.  argument
45     /// - `self.inner` is a tree of `Layered`s where _all_ arms of those  argument
63 // === impl Layered ===  argument
65 impl<L, S> Layered<L, S>  implementation
89 impl<L, S> Subscriber for Layered<L, S>  implementation
241 impl<S, A, B> Layer<S> for Layered<A, B, S>  implementation
385 impl<'a, L, S> LookupSpan<'a> for Layered<L, S>  implementation
401 impl<L, S> Layered<L, S>  impl
410 impl<A, B, S> Layered<A, B, S>  implementation
528 impl<A, B, S> fmt::Debug for Layered<A, B, S>  implementation