public function getTagHolderBackend() {
		if ($this->tagsBackend === null) {
			$this->tagsBackend = $this->getBackend();
		}
		
		return $this->tagsBackend;
	}
public function getTagHolderBackend() {
		if ($this->tagsBackend === null) {
			$this->tagsBackend = $this->getBackend();
		}
		
		return $this->tagsBackend;
	}
public function getTagHolderBackend ( ) { if ( $ this -> tagsBackend === null ) { $ this -> tagsBackend = $ this -> getBackend ( ) ; } return $ this -> tagsBackend ; }
Get the tags holding backend

@return BackendInterface
Get the tags holding backend