public function hasCacheFrontend() {
		if ($this->_cacheFrontendWrapper !== null) {
			return true;
		}
		
		if ($this instanceof LocatorAwareInterface
		 && $this->hasLocator()
		 && $this->getLocator()->has($this->getCacheFrontendServiceId())) {
			return true;
		}
		
		return false;
	}