def group4_forward_branch(layer, in_tensor):
    """Defines group 1 connections.

    Args:
        layer (torch.nn.Module):
            Network layer.
        in_tensor (torch.Tensor):
            Input tensor.

    Returns:
        torch.Tensor: Output of group 1 layer.

    """
    a = layer["up1"](in_tensor)
    return layer["conv1"](a)