Neos\Cache\Backend\RedisBackend::isFrozen PHP Метод

    public function isFrozen()
    {
        if (null === $this->frozen) {
            $this->frozen = $this->redis->exists($this->buildKey('frozen'));
        }
        return $this->frozen;
    }

 /**
  * @test
  */
 public function freezeFreezesTheCache()
 {
     $this->assertFalse($this->backend->isFrozen());
     for ($i = 0; $i < 10; $i++) {
         $this->backend->set('entry_' . $i, 'foo');
     }
     $this->backend->freeze();
     $this->assertTrue($this->backend->isFrozen());
 }