Webiny\Component\Http\Request\Query::get PHP Метод

    public function get($key, $value = null)
    {
        return $this->queryBag->key($key, $value, true);
    }

 public function testGet()
 {
     $_GET = ["name" => "jack"];
     $query = new Query();
     $this->assertSame("jack", $query->get("name"));
     $this->assertNull($query->get("NON_EXISTING"));
     $this->assertSame("doe", $query->get("NON_EXISTING_2", "doe"));
 }