function y2($property2, $property4, $property2y, $property4y) { self::$property2 = $property2; self::$property4 = $property4; self::$property2y = $property2y; self::$property4y = $property4y; }
function y2($property2, $property4) { self::$property2 = $property2; self::$property4 = $property4; }