create method
Creates a fleet namespace.
request - The metadata request object.
Request parameters:
parent - Required. The parent (project and location) where the Namespace
will be created. Specified in the format projects / * /locations / * /scopes / * .
Value must have pattern
^projects/\[^/\]+/locations/\[^/\]+/scopes/\[^/\]+$.
scopeNamespaceId - Required. Client chosen ID for the Namespace.
namespace_id must be a valid RFC 1123 compliant DNS label: 1. At most 63
characters in length 2. It must consist of lower case alphanumeric
characters or - 3. It must start and end with an alphanumeric character
Which can be expressed as the regex: [a-z0-9]([-a-z0-9]*[a-z0-9])?, with
a maximum length of 63 characters.
$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(
  Namespace request,
  core.String parent, {
  core.String? scopeNamespaceId,
  core.String? $fields,
}) async {
  final body_ = convert.json.encode(request);
  final queryParams_ = <core.String, core.List<core.String>>{
    if (scopeNamespaceId != null) 'scopeNamespaceId': [scopeNamespaceId],
    if ($fields != null) 'fields': [$fields],
  };
  final url_ = 'v1/' + core.Uri.encodeFull('$parent') + '/namespaces';
  final response_ = await _requester.request(
    url_,
    'POST',
    body: body_,
    queryParams: queryParams_,
  );
  return Operation.fromJson(response_ as core.Map<core.String, core.dynamic>);
}