Prado\Collections\TStack::clear PHP Метод

    public function clear()
    {
        $this->_c = 0;
        $this->_d = array();
    }

 public function testClear()
 {
     $stack = new TStack(array(1, 2, 3));
     $stack->clear();
     self::assertEquals(array(), $stack->toArray());
 }