no text in cluster after change icon

[AymenSoft]

i change the cluster icon to a personlized one, but the text dissepire i can't show it
please help and thank you
clusterManager.setIconGenerator(new IconGenerator() {

        @NonNull
        @Override
        public BitmapDescriptor getClusterIcon(@NonNull Cluster<BikesClusterItem> cluster) {
            return vectorCircle;
        }
        @NonNull
        @Override
        public BitmapDescriptor getClusterItemIcon(@NonNull BikesClusterItem clusterItem) {

            BitmapDescriptor pinMarker = finalPinWork;

            switch (clusterItem.getBike_breakdown()){
                case "false":
                    pinMarker = finalPinWork;
                    break;
                case "true":
                    pinMarker = finalPinMaintenance;
                    break;
                default:
                    break;
            }

            return pinMarker;
        }
    });