annotate method
      
Future<BatchAnnotateImagesResponse> 
annotate(
    
- BatchAnnotateImagesRequest request, {
- String? $fields,
Run image detection and annotation for a batch of images.
request - The metadata request object.
Request parameters:
$fields - Selector specifying which fields to include in a partial
response.
Completes with a BatchAnnotateImagesResponse.
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<BatchAnnotateImagesResponse> annotate(
  BatchAnnotateImagesRequest request, {
  core.String? $fields,
}) async {
  final body_ = convert.json.encode(request);
  final queryParams_ = <core.String, core.List<core.String>>{
    if ($fields != null) 'fields': [$fields],
  };
  const url_ = 'v1/images:annotate';
  final response_ = await _requester.request(
    url_,
    'POST',
    body: body_,
    queryParams: queryParams_,
  );
  return BatchAnnotateImagesResponse.fromJson(
    response_ as core.Map<core.String, core.dynamic>,
  );
}