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

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

        Returns:
            Tensor: output heatmap.
        """
        x = feats[-1]

        x = self.deconv_layers(x)
        x = self.conv_layers(x)
        x = self.final_layer(x)

        return x
Forward the network. The input is multi scale feature maps and the
        output is the heatmap.

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

        Returns:
            Tensor: output heatmap.
        
mmpose/mmpose/models/heads/heatmap_heads/heatmap_head.py