private static boolean isOnlyDelimiterStringJoinerInitializer(@NotNull PsiExpression construction) {
      construction = PsiUtil.skipParenthesizedExprDown(construction);
      if (!(construction instanceof PsiNewExpression newExpression)) return false;
      final PsiJavaCodeReferenceElement classReference = newExpression.getClassReference();
      if (!ConstructionUtils.isReferenceTo(classReference, STRING_JOINER)) {
        return false;
      }
      final PsiExpressionList argumentList = newExpression.getArgumentList();
      if (argumentList == null) return false;
      final PsiExpression[] arguments = argumentList.getExpressions();
      if (arguments.length != 1) return false;
      final PsiExpression argument = arguments[0];
      final PsiType argumentType = argument.getType();
      return InheritanceUtil.isInheritor(argumentType, CommonClassNames.JAVA_LANG_CHAR_SEQUENCE);
    }
private static boolean isOnlyDelimiterStringJoinerInitializer(@NotNull PsiExpression construction)