Any trait documentation mentions non-existing methods

[roosmaa]

In the paragraph about the any module:

Any itself can be used to get a TypeId, and has more features when used as a trait object. As &Any (a borrowed trait object), it has the is and as_ref methods, to test if the contained value is of a given type, and to get a reference to the inner value as a type. As &mut Any, there is also the as_mut method, for getting a mutable reference to the inner value.

Shouldn't the as_ref/as_mut methods mentioned be infact downcast_ref/downcast_mut methods? Can't find any as_ref/as_mut method implementations for the Any trait anywhere.