OptTMatchDo Method
            Executes 
whenSome(Unwrap()) if IsSome; 
whenNone() otherwise.
            
static Greet(Opt<User> user) {
    user.MatchDo(
        whenSome: u => Console.WriteLine($"Welcome back {u.Name}"),
        whenNone: Console.WriteLine("Hello")
    );
}
Namespace: Orx.Fun.OptionAssembly: Orx.Fun.Option (in Orx.Fun.Option.dll) Version: 1.2.1+ea79806fa5e0e04bfdaef2a1916930e75e2cde74
public void MatchDo(
	Action<T> whenSome,
	Action whenNone
)
Parameters
- whenSome  ActionT
 - Action to be called lazily when Some.
 - whenNone  Action
 - Action to be called lazily when None.