I know that it is possible to remove distinct values from the filters, as described in this article: https://docs.telerik.com/devtools/wpf/controls/radgridview/filtering/how-to/howto-display-all-distinct-values
But I want to add distinct values to the column filter. The use case would be when the user is creating a favorite for a specific set of filters. When the user comes back later to the list, it may not contain the values that the favorite filter had specified at that moment. But the user would like to still be able to see what the filters for the favorite looks like.
Is it possible to add distinct values to a column filter, without creating a custom filter editor?