public function testContains()
{
$item1 = 'item 1';
$item2 = 'item 2';
$item3 = 'item 3';
$items = [$item1, $item2];
$stack = new Stack($items);
$this->assertTrue($stack->contains($item2));
$this->assertFalse($stack->contains($item3));
}
public function postRun(KernelHandleEvent $e)
{
$this->domainStack->pop();
$this->domain = $this->domainStack->peek();
}