Contao\CoreBundle\Test\Session\Attribute\ArrayAttributeBagTest::testOffsetUnset PHP Method

    public function testOffsetUnset()
    {
        $bag = new ArrayAttributeBag('foobar_storageKey');
        $bag->set('foo', 'bar');
        unset($bag['foo']);
        $this->assertFalse($bag->has('foo'));
    }