code: private static void cleanStyles(Element e) {
          if (e == null) {
              return;
          }
  
          Element cur = e.children().first();
  
          // Remove any root styles, if we're able.
          if (!"readability-styled".equals(e.className())) {
              e.removeAttr("style");
          }
  
          // Go until there are no more child nodes
          while (cur != null) {
              // Remove style attributes
              if (!"readability-styled".equals(cur.className())) {
                  cur.removeAttr("style");
              }
              cleanStyles(cur);
              cur = cur.nextElementSibling();
          }
      }
docs: Remove the style attribute on every e and under.
  
  @param e