def METHOD_NAME(self, feats: Tuple[Tensor]) -> Tensor:
    """Forward the network. The input is multi scale feature maps and the
    output is the coordinates.
    Args:
        feats (Tuple[Tensor]): Multi scale feature maps.
    Returns:
        Tensor: output coordinates(and sigmas[optional]).
    """
    x = feats[-1]
    x = self.conv(x)
    return x.reshape(-1, self.num_joints, 3)