Should this stream be truncated?

Take this projection:

        $any: function(s, e) {}
        var streamname = '$projections-StoreProductManager-result';
        emit(streamname, 'myEvent', e, null);

If I reset this projection, should the stream $projections-StoreProductManager-result be truncated?
I assumed it would. pretty sure sure in the paste if I have had simialr projections but using linkTo instead that the linkTo streams were tracked and truncated.

So it turns out the stream did get truncated, but only after the first new event was emitted.
Maybe it was my misudnerstanding, I assumed it would truncate immediately after the reset.