public interface Scope
Injectorhas no scope, meaning it has no state from the framework's perspective -- the
Injectorcreates it, injects it once into the class that required it, and then immediately forgets it. Associating a scope with a particular binding allows the created instance to be "remembered" and possibly used again for other injections.
An example of a scope is
Scope implementations are strongly encouraged to override
Object.toString() in the returned provider and include the backing
key- binding key
unscoped- locates an instance when one doesn't already exist in this scope.