create method
      
Future<ApigatewayOperation> 
create(
    
- ApigatewayApiConfig request,
- String parent, {
- String? apiConfigId,
- String? $fields,
Creates a new ApiConfig in a given project and location.
request - The metadata request object.
Request parameters:
parent - Required. Parent resource of the API Config, of the form:
projects / * /locations/global/apis / * 
Value must have pattern
^projects/\[^/\]+/locations/\[^/\]+/apis/\[^/\]+$.
apiConfigId - Required. Identifier to assign to the API Config. Must be
unique within scope of the parent resource.
$fields - Selector specifying which fields to include in a partial
response.
Completes with a ApigatewayOperation.
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<ApigatewayOperation> create(
  ApigatewayApiConfig request,
  core.String parent, {
  core.String? apiConfigId,
  core.String? $fields,
}) async {
  final body_ = convert.json.encode(request);
  final queryParams_ = <core.String, core.List<core.String>>{
    if (apiConfigId != null) 'apiConfigId': [apiConfigId],
    if ($fields != null) 'fields': [$fields],
  };
  final url_ = 'v1/' + core.Uri.encodeFull('$parent') + '/configs';
  final response_ = await _requester.request(
    url_,
    'POST',
    body: body_,
    queryParams: queryParams_,
  );
  return ApigatewayOperation.fromJson(
    response_ as core.Map<core.String, core.dynamic>,
  );
}