[sv-ac] checker: why are parameters not allowed? Need tofile a mantis?

Dmitry,
Why are parameters not allowed in checkers, in the same style as module?
If we do allow them, would that bring more consistency in design style, and
possibly simplify the design of tools because of this parallelism to
modules?
Before I file a mantis for future exploration of this, I would like to hear
your comments.
Thanks,
Ben

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