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

    public function findIdentifiersByTag($tag)
    {
        return $this->redis->sMembers($this->buildKey('tag:' . $tag));
    }

 /**
  * @test
  */
 public function removeRemovesEntryFromCache()
 {
     for ($i = 0; $i < 10; $i++) {
         $this->backend->set('entry_' . $i, 'foo', ['tag1']);
     }
     $this->assertCount(10, $this->backend->findIdentifiersByTag('tag1'));
     $this->assertEquals('foo', $this->backend->get('entry_1'));
     $actualEntries = [];
     foreach ($this->backend as $key => $value) {
         $actualEntries[] = $key;
     }
     $this->assertCount(10, $actualEntries);
     $this->backend->remove('entry_3');
     $this->assertCount(9, $this->backend->findIdentifiersByTag('tag1'));
     $this->assertFalse($this->backend->get('entry_3'));
     $actualEntries = [];
     foreach ($this->backend as $key => $value) {
         $actualEntries[] = $key;
     }
     $this->assertCount(9, $actualEntries);
 }