code: public alluxio.grpc.WorkerRange getWorkerRange() {
      alluxio.grpc.WorkerRange result = alluxio.grpc.WorkerRange.valueOf(workerRange_);
      return result == null ? alluxio.grpc.WorkerRange.ALL : result;
    }
docs: <code>optional .alluxio.grpc.block.WorkerRange workerRange = 3;</code>