Extension for using FilterHits with BuildFilter()

gistfile1.cs

public static ITypeSearch<TSource> FilterHits<TSource>(this ITypeSearch<TSource> search, Filter filter)
{
    return new Search<TSource, IQuery>(search, context =>
    {
        var filterToAdd = filter;
        if (context.RequestBody.Filter.IsNotNull())
        {
            filterToAdd = filter & context.RequestBody.Filter;
        }
        context.RequestBody.Filter = filterToAdd;
    });
}