private void extractArguments(@NotNull GrArgumentList argumentList) {
    GrExpression[] expr = argumentList.getExpressionArguments();

    if (expr.length == 1 && expr[0] instanceof GrLiteral) {
      Object value = ((GrLiteral)expr[0]).getValue();
      if (value instanceof String s) {
        if (StringUtil.isJavaIdentifier(s)) {
          add((String)value);
        }
      }
    }
  }
private void extractArguments(@NotNull GrArgumentList argumentList)