create method
      
Future<GoogleCloudDialogflowV2Version> 
create(
    
- GoogleCloudDialogflowV2Version request,
- String parent, {
- String? $fields,
Creates an agent version.
The new version points to the agent instance in the "default" environment.
request - The metadata request object.
Request parameters:
parent - Required. The agent to create a version for. Supported formats:
- projects//agent-- projects//locations//agentValue must have pattern- ^projects/\[^/\]+/agent$.
$fields - Selector specifying which fields to include in a partial
response.
Completes with a GoogleCloudDialogflowV2Version.
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<GoogleCloudDialogflowV2Version> create(
  GoogleCloudDialogflowV2Version request,
  core.String parent, {
  core.String? $fields,
}) async {
  final body_ = convert.json.encode(request);
  final queryParams_ = <core.String, core.List<core.String>>{
    if ($fields != null) 'fields': [$fields],
  };
  final url_ = 'v2/' + core.Uri.encodeFull('$parent') + '/versions';
  final response_ = await _requester.request(
    url_,
    'POST',
    body: body_,
    queryParams: queryParams_,
  );
  return GoogleCloudDialogflowV2Version.fromJson(
      response_ as core.Map<core.String, core.dynamic>);
}