code: @Override
    public void exitStandardMessageOptionMessageSetWireFormat(
        final StandardMessageOptionMessageSetWireFormatContext ctx) {
      verifyOptionNameUnique("messageSetWireFormat", ctx.getStart());
      scopes.getMessageOptions().setMessageSetWireFormat(
          Boolean.valueOf(ctx.BooleanLiteral().getText()));
    }
docs: **** Standard MessageOptions