Calls forward for all internally linked pads of pad. This function deals with
dynamically changing internal pads and will make sure that the forward
function is only called once for each pad.
When forward returns true, no further pads will be processed.
Calls forward for all internally linked pads of pad. This function deals with dynamically changing internal pads and will make sure that the forward function is only called once for each pad.
When forward returns true, no further pads will be processed.