How to set animation transition

I have a question about how to set animation transition when I use setActionThread() method to play an animation. How can I do it in script. I find a static member 'bool sUseAnimationTransitions' in player.cpp,but whether or not if I change it will affect all my animation.I want to set animation transition only effect on one instance or even on one sequence.Besides ,Is there anyone else know why the member of sUseAnimationTransitions set as static ? Sorry for my bad English.