rollback method
Rolls back a previously Aborted or Failed NodePool upgrade.
This makes no changes if the last upgrade successfully completed.
request - The metadata request object.
Request parameters:
projectId - Deprecated. The Google Developers Console
project ID or project number.
This field has been deprecated and replaced by the name field.
zone - Deprecated. The name of the Google Compute Engine
zone
in which the cluster resides. This field has been deprecated and replaced
by the name field.
clusterId - Deprecated. The name of the cluster to rollback. This field
has been deprecated and replaced by the name field.
nodePoolId - Deprecated. The name of the node pool to rollback. This
field has been deprecated and replaced by the name field.
$fields - Selector specifying which fields to include in a partial
response.
Completes with a Operation.
Completes with a commons.ApiRequestError if the API endpoint returned an error.
If the used http.Client completes with an error when making a REST call,
this method will complete with the same error.
Implementation
async.Future<Operation> rollback(
  RollbackNodePoolUpgradeRequest request,
  core.String projectId,
  core.String zone,
  core.String clusterId,
  core.String nodePoolId, {
  core.String? $fields,
}) async {
  final body_ = convert.json.encode(request);
  final queryParams_ = <core.String, core.List<core.String>>{
    if ($fields != null) 'fields': [$fields],
  };
  final url_ =
      'v1/projects/' +
      commons.escapeVariable('$projectId') +
      '/zones/' +
      commons.escapeVariable('$zone') +
      '/clusters/' +
      commons.escapeVariable('$clusterId') +
      '/nodePools/' +
      commons.escapeVariable('$nodePoolId') +
      ':rollback';
  final response_ = await _requester.request(
    url_,
    'POST',
    body: body_,
    queryParams: queryParams_,
  );
  return Operation.fromJson(response_ as core.Map<core.String, core.dynamic>);
}