Type Alias Ref 

pub type Ref<T> = Arc<T>;

A generic reference type that’s used as the default type for types with the singleton lifetime.

When the multithread feature is set, this defaults to std::sync::Arc. When the multithread feature is NOT set, this defaults to std::rc::Rc.

It’s advised to use Ref instead of the concrete type because it simplifies enabling multithread when required.

Aliased Type

pub struct Ref<T> { /* private fields */ }