I have a progress sprite, and following the demo I have the following:

setProgress(0);
setDirection(ProgressBar::dir_0);
_tween = addTween(ProgressBar::TweenProgress(1.0f), cooldown);
_tween->addEventListener(TweenEvent::DONE, CLOSURE(this, &WE_SpellGUI::spellCast));

I see I can complete it using;

_tween->complete();

Is it possible to pause the tween?