code: private BigQueryLoadJobReference triggerBigQueryLoadJob() {
      Job job = createJob();
      // Set up Bigquery Insert
      try {
        Insert insert =
            BigQueryLoadGoogleCloudStorageFilesJob.getBigquery().jobs().insert(projectId, job);
        Job executedJob = insert.execute();
        log.info("Triggered the bigQuery load job for files " + fileSet + " . Job Id = "
            + executedJob.getId());
        return new BigQueryLoadJobReference(projectId, executedJob.getJobReference());
      } catch (IOException e) {
        throw new RuntimeException("Error in triggering BigQuery load job for files " + fileSet, e);
      }
    }
docs: Triggers a bigquery load {@link Job} request and returns the job Id for the same.