@Override
  public void updateJob(UUID jobId, PortabilityJob job) throws IOException {
    updateJob(jobId, job, null);
  }
Verifies a {@code PortabilityJob} already exists for {@code jobId}, and updates the entry to
{@code job}.

@throws IOException if a job didn't already exist for {@code jobId} or there was a problem
    updating it
extensions/cloud/portability-cloud-local/src/main/java/org/datatransferproject/cloud/local/LocalJobStore.java