Composite actor in the CT domain. This class is derived from TypedCompositeActor and implements the CTStepSizeControlActor interface. Normally, in the CT domain, opaque composite actors are not fired in every iteration. They are only fired in discrete iterations, when there is a possibility of events. Actors that implement the CTStepSizeControlActor interface, however, such as this one, are fired in every iteration.
The key task of this actor is to implement step-size control methods. If the director of this composite actor is an instance of CTTransparentDirector, then the CTStepSizeControlActor calls will be delegated to its local director. Otherwise, they return default values.
This composite actor should be used when a CT subsystem needs to transfer its step size control information to the outer domain. Typical usage includes CT inside CT or CT inside FSM inside CT. If you construct a modal model, then by default, refinements of the modes are actors like this one that implement the CTStepSizeControlActor interface.
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