/**
* This method evaluates whether the left operand is NOT equal to the right operand.
*
* @access public
* @static
* @param ILinkedList\Type $xs the left operand
* @param Core\Type $ys the right operand
* @return IBool\Type whether the left operand is NOT equal
* to the right operand
*/
public static function ne(ILinkedList\Type $xs, Core\Type $ys) : IBool\Type
{
// !=
return IBool\Module::not(ILinkedList\Module::eq($xs, $ys));
}