Prado\Collections\TQueue::contains PHP Method

    public function contains($item)
    {
        return array_search($item, $this->_d, true) !== false;
    }

 public function testContains()
 {
     $queue = new TQueue(array(1, 2, 3));
     self::assertEquals(true, $queue->contains(2));
     self::assertEquals(false, $queue->contains(4));
 }