Hi, Is there any way in Umbrac v9 to exclude certain content values from the examine index? In this instance I have a multi-node treepicker used to highlight related content which I want to exclude from search indexing and showing up in the search results. Currently I have overridden the 'PerformingIndexValues' event to do this, but I can only see an option to add or combing values, instead of removing them from the Index (see code below).

private void IndexProviderTransformingIndexValues(object sender, IndexingItemEventArgs args)
    {
        try
        {

            if (int.TryParse(args.ValueSet.Id, out var pageId))
            {
                if (args.ValueSet.ItemType == "newsArticle") //Set news article custom index fields
                {
                    using (UmbracoContextReference umbracoContextReference = _umbracoContextFactory.EnsureUmbracoContext())
                    {
                        var contentNode = umbracoContextReference.UmbracoContext.Content.GetById(pageId);
                        if (contentNode != null)
                            args = SetSearchableValues(args, contentNode);
                    }
                }
            }
        }
        catch (Exception e)
        {
            _logger.LogError(e, "IndexProviderTransformingIndexValues: Exception: {0} | Message: {1} | Stack Trace: {2}", e.InnerException != null ? e.InnerException.ToString() : "", e.Message != null ? e.Message.ToString() : "", e.StackTrace);
        }
    }

    private IndexingItemEventArgs SetSearchableValues(IndexingItemEventArgs args, IPublishedContent contentNode)
    {
        try
        {
            var combinedFields = new StringBuilder();

            //Loop through all fields and combine into single string of searchable content
            foreach (var fieldValues in args.ValueSet.Values)
            {
                foreach (var value in fieldValues.Value)
                { 
                    if (value != null)
                        combinedFields.AppendLine(value.ToString());
                }
            }

            //Index custom field values
            args.ValueSet.Add("searchHomepageKey", contentNode.AncestorOrSelf("homePage").Key.ToString());
            args.ValueSet.Add("searchParentKey", contentNode.Parent.Key.ToString());
            args.ValueSet.Set("searchCurrentKey", contentNode.Key.ToString());
            args.ValueSet.Add("searchableKeywords", combinedFields.ToString().ToLower());
            args.ValueSet.Set("sortableDate", contentNode.CreateDate.ToString("yyyyMMddHHmmss"));

        }
        catch (Exception e)
        {
            _logger.LogError(e, "SetSearchableValues: Exception: {0} | Message: {1} | Stack Trace: {2}", e.InnerException != null ? e.InnerException.ToString() : "", e.Message != null ? e.Message.ToString() : "", e.StackTrace);
        }

        return args;
    }

Any help much appreciated.