code: function startDrones (pkg, done) {
      if (pkg.drones == 0) {
        return done();
      }
  
      var started = 0;
  
      async.whilst(function () {
        return started < pkg.drones;
      }, function (next) {
        started++;
        server.drone.start(pkg, next);
      }, done);
    }
docs: Helper function which starts multiple drones a given application.