code: private void removeCssLinks() {
  		if (this.isInit) {
  			return;
  		}
  		this.isInit = true;
  		// Remove all existing link element
  		NodeList<Element> links = this.getHead().getElementsByTagName(LinkElement.TAG);
  		int size = links.getLength();
  		for (int i = 0; i < size; i++) {
  			LinkElement elem = LinkElement.as(links.getItem(0));
  			if ("stylesheet".equals(elem.getRel())) {
  				elem.removeFromParent();
  			}
  		}
  	}
docs: Removes all link tags in the head if not initialized.