The Listen attribute represents a method that can be invoked via a dispatcher. Sometimes this is automatic by the inheriting type, or done via <see cref="M:Woosh.Signals.ObservableUtility.AutoRegisterEvents(System.Object,Woosh.Signals.IDispatchTable)" />. Some methods can be global, meaning it will only be able to be invoked by the global dispatcher. Static methods are always considered to be registered to the global dispatcher.
