Module apply 

Traits

Apply

Apply is a trait that allows for mapping over a reference to a type T by applying a function F to it, producing a new type U. The result is wrapped in a container type defined by the implementor of the trait.

ApplyMut

The ApplyMut trait allows for in-place mapping of a mutable reference to a type T

ApplyOnce

A the ApplyOnce trait is similar to [Map], but it consumes the instance instead of borrowing it;