code: private GedToken getToken(final String tag) {
          GedToken gedToken = tokens.get(tag);
          if (gedToken == null) {
              // Any unknown token is an attribute, retaining its tag.
              gedToken = new GedToken(tag, ATTR_FACTORY);
          }
          return gedToken;
      }
docs: Find the token processor for this tag. Defaults to attribute.
  
  @param tag the tag.
  @return the token processor.