async function main(projectId, region, jobName, groupName, taskNumber) {
  // [START batch_get_task]
  /**
   * TODO(developer): Uncomment and replace these variables before running the sample.
   */
  // const projectId = 'YOUR_PROJECT_ID';
  /**
   * The region that hosts the job.
   */
  // const region = 'us-central-1';
  /**
   * The name of the job you want to retrieve information about.
   */
  // const jobName = 'YOUR_JOB_NAME';
  /**
   * The name of the group that owns the task you want to check.
   * Usually it's `group0`.
   */
  // const groupName = 'group0';
  /**
   * The number of the task you want to look up.
   */
  // const taskNumber = 0;

  // Imports the Batch library
  const batchLib = require('@google-cloud/batch');

  // Instantiates a client
  const batchClient = new batchLib.v1.BatchServiceClient();

  async function callGetJob() {
    // Construct request
    const request = {
      name:
        `projects/${projectId}/locations/${region}/jobs/${jobName}` +
        `/taskGroups/${groupName}/tasks/${taskNumber}`,
    };

    // Run request
    const response = await batchClient.getTask(request);
    console.log(response);
  }

  await callGetJob();
  // [END batch_get_task]
}
Retrieves information about the specified job, most notably its status.

@param {string} projectId - ID or number of the Google Cloud project you want to use.
@param {string} region - The Google Cloud region to use, e.g. 'us-central1'
@param {string} jobName - ID used to uniquely identify the Job within this project and region.
 This field should contain at most 63 characters.
 Only alphanumeric characters or '-' are accepted.
 The '-' character cannot be the first or the last one.
@param {string} groupName - the name of the group that owns the task you want to check.
Usually it's `group0`.
@param {number} taskNumber - number of the task you want to look up.