toMap method
Implementation
Map<String, dynamic> toMap() {
final Map<String, dynamic> updateMap = <String, dynamic>{};
void addIfNonNull(String fieldName, dynamic value) {
if (value != null) {
updateMap[fieldName] = value;
}
}
addIfNonNull('markersToAdd', serializeOverlaySet(markersToAdd));
addIfNonNull('markersToChange', serializeOverlaySet(markersToChange));
addIfNonNull('markerIdsToRemove', markerIdsToRemove.toList());
return updateMap;
}