Creation of actors that do more than one API call is rather complex and it's easy to get wrong.  Add methods to simplify the task of creating an actor.  Useful methods that may be added:

• allOf - completes when all sub-tasks complete
• anyOf - completes when any sub-task completes
• seq - executes a series of sub-tasks, in order
• retry - retries a sub-task until the max retries have been reached