function main(projectId, zone, instanceName, deleteProtection) {
  // [START compute_delete_protection_set]
  /**
   * TODO(developer): Uncomment and replace these variables before running the sample.
   */
  // const projectId = 'YOUR_PROJECT_ID';
  // const zone = 'europe-central2-b';
  // const instanceName = 'YOUR_INSTANCE_NAME';
  // const deleteProtection = True;

  const compute = require('@google-cloud/compute');

  // Update the delete protection setting of given instance.
  async function setDeleteProtection() {
    const instancesClient = new compute.InstancesClient();

    const [response] = await instancesClient.setDeletionProtection({
      project: projectId,
      zone,
      // Set the delete protection bit.
      deletionProtection: deleteProtection,
      resource: instanceName,
    });
    let operation = response.latestResponse;
    const operationsClient = new compute.ZoneOperationsClient();

    // Wait for the create operation to complete.
    while (operation.status !== 'DONE') {
      [operation] = await operationsClient.wait({
        operation: operation.name,
        project: projectId,
        zone: operation.zone.split('/').pop(),
      });
    }

    console.log('Instance updated.');
  }

  setDeleteProtection();
  // [END compute_delete_protection_set]
}
Updates the delete protection setting of given instance.

@param {string} projectId - Project ID or project number of the Cloud project you want to use.
@param {string} zone - Name of the zone you want to check, for example: us-west3-b
@param {string} instanceName - Name of the new virtual machine.
@param {string} deleteProtection - boolean value indicating if the new virtual machine should be
   protected against deletion or not.