code: private Node parseAndRecordTypeNameNode(JsDocToken token, int lineno,
                                            int startCharno, boolean matchingLC) {
      return parseAndRecordTypeNode(token, lineno, startCharno, matchingLC, true);
    }
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.
  @param lineno The line of the type expression.
  @param startCharno The starting character position of the type expression.
  @param matchingLC Whether the type expression starts with a "{".
  @return The type expression found or null if none.