private JsonWriter open(int empty,String openBracket) throws IOException {
  beforeValue();
  push(empty);
  out.write(openBracket);
  return this;
}

private JsonWriter open ( int empty , String openBracket ) throws IOException { beforeValue ( ) ; push ( empty ) ; out . write ( openBracket ) ; return this ; }
enters a new scope by appending any necessary whitespace and the given bracket .
