Sokil\Mongo\Cache::has PHP Метод

    public function has($key)
    {
        return (bool) $this->get($key);
    }

 public function testDeleteNotMatchingAnyTag()
 {
     $this->cache->setNeverExpired('php', 'PHP: Hypertext Processor', array('language', 'interpretable'))->setNeverExpired('c', 'C', array('language', 'compileable'));
     $this->assertEquals(2, count($this->cache));
     $this->cache->deleteNotMatchingAnyTag(array('compileable', 'elephant'));
     $this->assertEquals(1, count($this->cache));
     $this->assertTrue($this->cache->has('c'));
 }