inbox. The carousel then uses your factory function to create a new child
component. This way, a sequence of operations can be automatically chained
together.

If the argument source needs to receive a "NEXT" message before sending its
first set of arguments, then set the argument make1stRequest=True when creating
the carousel.

You can actually send new orders to the "next" inbox at any time, not just in
response to requests from the Carousel. The carousel will immediately ask that
child to terminate; then as soon as it has done so, it will create the new one
and wire it in in its place.
