public void Launch(bool stopMove, bool waitIsCast, bool ignoreIfCast, string luaUnitId)

what is... "waitIsCast"? and "ignoreIfCast" ?

wait if any other cast in progress and then cast this spell - for spells with global cooldowns

ignore if currently in cast and cast spell - for spells like racials or not shared with global cooldown.

 

Thank you @camelot10