create method
      
Future<Operation> 
create(
    
- WorkstationCluster request,
- String parent, {
- bool? validateOnly,
- String? workstationClusterId,
- String? $fields,
Creates a new workstation cluster.
request - The metadata request object.
Request parameters:
parent - Required. Parent resource name.
Value must have pattern ^projects/\[^/\]+/locations/\[^/\]+$.
validateOnly - Optional. If set, validate the request and preview the
review, but do not actually apply it.
workstationClusterId - Required. ID to use for the workstation cluster.
$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> create(
  WorkstationCluster request,
  core.String parent, {
  core.bool? validateOnly,
  core.String? workstationClusterId,
  core.String? $fields,
}) async {
  final body_ = convert.json.encode(request);
  final queryParams_ = <core.String, core.List<core.String>>{
    if (validateOnly != null) 'validateOnly': ['${validateOnly}'],
    if (workstationClusterId != null)
      'workstationClusterId': [workstationClusterId],
    if ($fields != null) 'fields': [$fields],
  };
  final url_ =
      'v1/' + core.Uri.encodeFull('$parent') + '/workstationClusters';
  final response_ = await _requester.request(
    url_,
    'POST',
    body: body_,
    queryParams: queryParams_,
  );
  return Operation.fromJson(response_ as core.Map<core.String, core.dynamic>);
}