code: function init(dataset_id, options, cb) {
    debug('[%s] init sync with options %j', dataset_id, options);
    datasets.init(dataset_id, options);
    //make sure we use the exported version here as the start function should be called only ONCE
    module.exports.api.start(function(err) {
      if (err) {
        return cb(err);
      }
      syncStorage.updateManyDatasetClients({datasetId: dataset_id}, {stopped: false}, cb);
    });
  }
docs: Initialise cloud data sync service for specified dataset.