def forward(self, feats: Tuple[Tensor]):
        """Forward the network. The input is multi scale feature maps and the
        output is coordinates and coordinates visibility.

        Args:
            feats (Tuple[Tensor]): Multi scale feature maps.

        Returns:
            Tuple[Tensor]: output coordinates and coordinates visibility.
        """
        x_pose = self.pose_head.forward(feats)
        x_vis = self.vis_forward(feats)

        return x_pose, x_vis
Forward the network. The input is multi scale feature maps and the
        output is coordinates and coordinates visibility.

        Args:
            feats (Tuple[Tensor]): Multi scale feature maps.

        Returns:
            Tuple[Tensor]: output coordinates and coordinates visibility.
        
mmpose/mmpose/models/heads/hybrid_heads/vis_head.py