Is there a way to add a raw filter string to a Filtered Query?

[aochsner]

http://stackoverflow.com/questions/26172103/nest-is-there-a-way-to-add-a-raw-filter-string-to-a-filtered-query/26402581

I know I can use QueryRaw and FilterRaw but I want the ability to add a raw filter string to a filtered query. Unfortunately, it looks like FilterDescriptor.Raw is internal. Am I missing something?

The closest I've come is:

var filter = ((ISearchRequest) new SearchDescriptor<object>().FilterRaw("<raw filter here>")).Filter;