markerUpdatesToJson function
Implementation
Map<String, dynamic> markerUpdatesToJson(MarkerUpdates markerUpdates) {
final Map<String, dynamic> updateMap = <String, dynamic>{};
addToMap(
updateMap, Param.markersToInsert, markerToList(markerUpdates.insertSet));
addToMap(
updateMap, Param.markersToUpdate, markerToList(markerUpdates.updateSet));
addToMap(updateMap, Param.markersToDelete,
markerUpdates.deleteSet.map<dynamic>((MarkerId m) => m.id).toList());
return updateMap;
}