code: Node parseAndRecordTypeNode(JsDocToken token) {
      return parseAndRecordTypeNode(token, stream.getLineno(), stream.getCharno(),
          token == JsDocToken.LEFT_CURLY, false);
    }
docs: Looks for a type expression at the current token and if found,
  returns it. Note that this method consumes input.
  
  @param token The current token.
  @return The type expression found or null if none.