??!!!
Yes it will work with channels returning a list, according to Conditional operator:
Scalar or list context propagates downward into the 2nd or 3rd argument, whichever is selected.
And it won't execute $self->level($level) once for each item of the returned list, which is good.

Now, the reason why channels is missing is because... well, gwhite didn't show any sub channels { ... } in the module... But he didn't state that it does not exist, either...

[]s, HTH, Massa (κς,πμ,πλ)

In reply to Re^4: I don't understand this grep by massa
in thread I don't understand this grep by gwhite

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