Clear an iterator in ADF 10g

The mission is to empty out an iterator without setting its Refresh attribute to “never” and consequentially executing it manually. What I ended up doing, when I needed this once, was adding a parameter to the query WHERE clause (something like “and 1 = nvl(:param, 1)”) and invoking it with a zero when I needed it empty. Apparently there is an easier way.
Say the iterator to clear is defined in the pageDef as:

Then the code in the backing bean would look like:

That’s it. Hope this helps!