integration-faces/src/main/java/org/ocpsoft/rewrite/faces/RewriteViewHandler.java
private boolean isBookmarkable()
   {
      Boolean result = bookmarkable.get();
      if (result == null)
      {
         result = false;
         bookmarkable.set(result);
      }
      return result;
   }
private boolean isBookmarkable()
   {
      Boolean result = bookmarkable.get();
      if (result == null)
      {
         result = false;
         bookmarkable.set(result);
      }
      return result;
   }
<b>NOTE:</b> This method should only be used by the getBookmarkableURL and getActionURL methods, for the purposes
of rewriting form URLs (which do not include viewParameters.)

@return Bookmarkable state - defaults to false if not previously set;