code: @Override
    protected ImmutableList<String> parseElements(String xml) {
      Optional<XmlElement> child = XmlConverter.getChildOpt(xml, "query", "backlinks");
      ImmutableList.Builder<String> titleCollection = ImmutableList.builder();
      if (child.isPresent()) {
        List<XmlElement> backlinks = child.get().getChildren("bl");
        for (XmlElement backlink : backlinks) {
          titleCollection.add(backlink.getAttributeValue("title"));
        }
      }
      return titleCollection.build();
    }
docs: picks the article name from a MediaWiki api response.
  
  @param xml text for parsing