create method
      
Future<GoogleCloudMlV1Trial> 
create(
    
- GoogleCloudMlV1Trial request,
- String parent, {
- String? $fields,
Adds a user provided trial to a study.
request - The metadata request object.
Request parameters:
parent - Required. The name of the study that the trial belongs to.
Value must have pattern
^projects/\[^/\]+/locations/\[^/\]+/studies/\[^/\]+$.
$fields - Selector specifying which fields to include in a partial
response.
Completes with a GoogleCloudMlV1Trial.
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<GoogleCloudMlV1Trial> create(
  GoogleCloudMlV1Trial 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': [$fields],
  };
  final url_ = 'v1/' + core.Uri.encodeFull('$parent') + '/trials';
  final response_ = await _requester.request(
    url_,
    'POST',
    body: body_,
    queryParams: queryParams_,
  );
  return GoogleCloudMlV1Trial.fromJson(
    response_ as core.Map<core.String, core.dynamic>,
  );
}