Attempts to free up memory of the sub-flow that it belongs to.
This actor is useful in case when sub-flows are only executed once, but still keep their data-structures and gobble up unnecessary memory. One scenario is having a adams.flow.control.Branch actor with lots of sequences as branches, which only get executed once.
The parent must implement adams.flow.core.SubFlowWrapUp in order for this to work.
CAUTION: Behind the scenes, all actors below this actor's parent will call their wrapUp() methods to conserve space. Therefore, use this actor with caution, as it will basically reset the actors.

Additional information

Flow input/output:
- input: adams.flow.core.Unknown