code: function getWorkerData(worker) {
    /* istanbul ignore if */
    if (!worker) {
      throw new TypeError("Trying to get private data for null worker?!");
    }
  
    var data = worker[clusterphone.workerDataAccessor];
    if (!data) {
      worker[clusterphone.workerDataAccessor] = data = {};
    }
  
    return data;
  }
docs: Gets our private data section from a worker object.