Combining sequential and parallel animation

[mirelon]

I have QSequentialAnimationGroup that consists of 3 animations. The second one is QParallelAnimationGroup.
So timeline looks like:

• 0: Animation 1 starts
• 1: Animation 1 ends, Animations 2a,2b,2c starts
• t: All of animations 2a,2b,2c ends, Animation 3 starts
• t+1: Animation 3 ends

This is the default behavior. But how can I change that behavior? I want the animation 3 start when any of animations 2a,2b,2c ends.