private static boolean isZero(GrExpression expression) {
    @NonNls
    final String text = expression.getText();
    return "0".equals(text) ||
        "0x0".equals(text) ||
        "0X0".equals(text) ||
        "0.0".equals(text) ||
        "0L".equals(text) ||
        "0l".equals(text);
  }
private static boolean isZero(GrExpression expression)