Hi, Help needed in filtering by optional field. I am usning instantsearch.js and using filters. how to filter optional fields. for example I have member collection with optional field 'owner_id'. I see for a particular Member if owner_id is set to null then that Member in typesense has no owner_id field. And i want to filter members by valid owner_id . Below code not helping. though company filter works.

configure({
            hitsPerPage: 15,
            filters: `member_type:=company && owner_id:!=null`,
        }),