Returns a function accepting an array of one or more event types which resolves with the matching events.
An existing Actor
A function accepting an array of one or more event types which resolves with the matching events
Runs an xs.Actor until it sends one or more events (in order).
An existing Actor
One or more event types (the type field of an
xs.EventObject EventObject) to wait for (in order)
The matching events (assuming they all occurred in order)
Returns itself.