lib/storage/sync-updates.js
function(datasetId, criteria, options, callback) {
      return metrics.timeAsyncFunc(metrics.KEYS.MONGODB_OPERATION_TIME, doListUpdates)(datasetId, criteria, options, callback);
    }
function(datasetId, criteria, options, callback) {
      return metrics.timeAsyncFunc(metrics.KEYS.MONGODB_OPERATION_TIME, doListUpdates)(datasetId, criteria, options, callback);
    }
List the updates that match the given list criteria
@param {String} datasetId
@param {Object} criteria the list criteria, a mongodb query object
@param {Object} options options for the find option, like `limit`
@param {Function} callback