The code about head is different from the paper

[minhoooo1]

https://github.com/Wolfwjs/GANet/blob/7378d7bd34e5d355353de3ac4961accf06b75e94/mmdet/models/dense_heads/ganet_head.py#L240

There are only two heads self.keypts_head and self.offset_head in the paper. Why are there two heads self.centerpts_head and self.reg_head in the code?