Put example of parallel debug code back in.
Put example of parallel debug code back in.

yuhangwang/PINY,TuckermanGroup/PINY,TuckermanGroup/PINY,yuhangwang/PINY,TuckermanGroup/PINY,TuckermanGroup/PINY,yuhangwang/PINY,yuhangwang/PINY,TuckermanGroup/PINY