code: public TagHandler getHandler(Tag tag) {
          if (handlers.containsKey(tag.getName())) {
              return handlers.get(tag.getName());
          }
          return null;
      }
docs: Method to get {@link TagHandler} by tag, can be overridden to change the logic of handler searching
  
  @param tag
  - tag to be handled
  @return - this for chaining