Imaginal module

[asmaloney]

There are several examples in the tutorials that use a buffer called imaginal:

imaginal=Buffer()

...but none of them actually use ImaginalModule which is the thing that actually implements the expected delay. (pm_4.py in the intro tutorials is a good example.)

Unless I'm misunderstanding the code, this seems like it's a mistake and the results will be invalid.

How is ImaginalModule supposed to be used?