gistfile1.dart

library main;

import 'dart:async';

void main() {

  var zs = new ZoneSpecification(print: onPrint);
  var zs2 = new ZoneSpecification(print: onPrint2);
  var sc;
    sc = new StreamController();
  runZoned(() {
    print("registering");
    sc.stream.listen(print);
  }, zoneSpecification: zs);
  runZoned(() {
    print("sending");
    sc.add("receiving");
  }, zoneSpecification: zs2);
}

onPrint(Zone self, ZoneDelegate parent, Zone zone, String line) {
  parent.print(zone, "[inZone] $line");
}

onPrint2(Zone self, ZoneDelegate parent, Zone zone, String line) {
  parent.print(zone, "[inZone2] $line");
}