Macro typedmap::impl_custom_bounds_with_key_container

macro_rules! impl_custom_bounds_with_key_container {
    ($bounds:ident, $dyn:ident, $key_container:ty, $trait_name:ident) => { ... };
    ($bounds:ident, $dyn:ident, $key_container:ty, $trait_name:ident, $(+ $marker_traits:ident)*) => { ... };
}

Implements Bounds & HasBounds traits for $bounds using $dyn trait object and wrapping $trait_name specifying KeyContainer with $key_container. Together with impl_dyn_trait_wrapper macro, it serves as simple way to implement custom Bounds.

For example see how ContainerWithHashAndClone is used as KeyContainer to allow key to be cloneable.