Bluz\Proxy\Request::isXmlHttpRequest PHP Method

    public static function isXmlHttpRequest()
    {
        return self::getHeader('X-Requested-With') == 'XMLHttpRequest';
    }

 /**
  * Test `Is` Methods
  */
 public function testIsMethods()
 {
     $this->assertTrue(Request::isGet());
     $this->assertFalse(Request::isPost());
     $this->assertFalse(Request::isPut());
     $this->assertFalse(Request::isDelete());
     $this->assertFalse(Request::isFlashRequest());
     $this->assertFalse(Request::isXmlHttpRequest());
 }