/// <summary>
/// Register a named process (a kind of DNS for Processes).
///
/// If the Process is visible to the cluster (PersistInbox) then the
/// registration becomes a permanent named look-up until Process.deregister
/// is called.
///
/// See remarks.
/// </summary>
/// <remarks>
/// Multiple Processes can register under the same name. You may use
/// a dispatcher to work on them collectively (wherever they are in the
/// cluster). i.e.
///
/// var regd = pid.Register(name);
/// Dispatch.Broadcast[regd].Tell("Hello");
/// Dispatch.First[regd].Tell("Hello");
/// Dispatch.LeastBusy[regd].Tell("Hello");
/// Dispatch.Random[regd].Tell("Hello");
/// Dispatch.RoundRobin[regd].Tell("Hello");
/// </remarks>
/// <param name="name">Name to register under</param>
/// <returns>A ProcessId that allows dispatching to the process via the name. The result
/// would look like /disp/reg/name</returns>
public static ProcessId Register(this ProcessId self, ProcessName name) =>
ActorContext.System(self).Register(name, self);