public static class SideAndCornerExtensions
{
	public static (Corner, Corner) GetCorners(this Side side)
		=> side switch {
			Side.Left   => (Corner.TopLeft, Corner.BottomLeft),
			Side.Top    => (Corner.TopLeft, Corner.TopRight),
			Side.Right  => (Corner.TopRight, Corner.BottomRight),
			Side.Bottom => (Corner.BottomLeft, Corner.BottomRight),
			_ => throw new ArgumentException($"Invalid Side value '{side}'", nameof(side)),
		};

	public static Side GetOpposite(this Side side)
		=> side switch {
			Side.Left   => Side.Right,
			Side.Top    => Side.Bottom,
			Side.Right  => Side.Left,
			Side.Bottom => Side.Top,
			_ => throw new ArgumentException($"Invalid Side value '{side}'", nameof(side)),
		};

	public static Corner GetOpposite(this Corner corner)
		=> corner switch {
			Corner.TopLeft     => Corner.BottomRight,
			Corner.TopRight    => Corner.BottomLeft,
			Corner.BottomRight => Corner.TopLeft,
			Corner.BottomLeft  => Corner.TopRight,
			_ => throw new ArgumentException($"Invalid Corner value '{corner}'", nameof(corner)),
		};
}