Module traits 

core traits and interfaces for wrappers and their operations, formatting, etc.

Traits

Get

The Get trait establishes a basic interface for objects to retrieve an immutable reference to an inner value of type T.

Wrapper

The Wrapper trait established a higher-kinded interface for single-value containers.

WrapperMut

The WrapperMut trait extends the Wrapper trait to provide mutable access to the inner value.