/**
* This method returns the swapped node.
*
* @access public
* @static
* @param IEither\Type $x the node to be swapped
* @return IEither\Type a tuple with the item swapped
*/
public static function swap(IEither\Type $x) : IEither\Type
{
$value = $x->unbox();
return $x->__isLeft() ? IEither\Type::right($value) : IEither\Type::left($value);
}
