cacheExample.swift

    ApolloService.shared.client.store.withinReadWriteTransaction({ transaction in

        let deletedDroidId = "..."
        //
        // Update the Query
        //
        let query = DroidListQuery()

        // Update Cache for a Query on a deletion
        try transaction.update(query: query) { (data: inout DroidListQuery.Data) in
            // Filter out the deleted droid and set the queries entries to be
            if let newEntries = data.entries?.filter({$0?.id != deletedDroidId}) {
                data.entries? = newEntries
            }
        }

        //
        // Update an Object / Fragments which may reference this droid.
        //
        try transaction.updateObject(ofType: DroidMission.self, withKey: droidMissionId, { (mission: inout DroidMission) in
            mission.droid = nil
        })

    }, callbackQueue: DispatchQueue.global(qos: .background)) { completion in
        print("\n\nApollo Cache Completion: \(completion)")
    }