examples/2048/2048/tile.go
func (t *Tile) Pos() (int, int) {
	return t.current.x, t.current.y
}
func (t *Tile) Pos() (int, int) {
	return t.current.x, t.current.y
}
// Pos returns the tile's current position.
// Pos is used only at testing so far.