def extra_repr(self):
        """Set the extra representation of the module,
        which will come into effect when printing the model.
        """
        summary = "in={_in_feats}"
        summary += ", alpha={alpha}, beta={beta}"
        if "self._bias" in self.__dict__:
            summary += ", bias={bias}"
        if "self._activation" in self.__dict__:
            summary += ", activation={_activation}"

        return summary.format(**self.__dict__)
Set the extra representation of the module,
        which will come into effect when printing the model.
        
python/dgl/nn/pytorch/conv/gcn2conv.py