get method
Gets the volume annotation.
Request parameters:
volumeId - The volume to retrieve annotations for.
layerId - The ID for the layer to get the annotations.
annotationId - The ID of the volume annotation to retrieve.
locale - The locale information for the data. ISO-639-1 language and
ISO-3166-1 country code. Ex: 'en_US'.
source - String to identify the originator of this request.
$fields - Selector specifying which fields to include in a partial
response.
Completes with a Volumeannotation.
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<Volumeannotation> get(
  core.String volumeId,
  core.String layerId,
  core.String annotationId, {
  core.String? locale,
  core.String? source,
  core.String? $fields,
}) async {
  final queryParams_ = <core.String, core.List<core.String>>{
    if (locale != null) 'locale': [locale],
    if (source != null) 'source': [source],
    if ($fields != null) 'fields': [$fields],
  };
  final url_ = 'books/v1/volumes/' +
      commons.escapeVariable('$volumeId') +
      '/layers/' +
      commons.escapeVariable('$layerId') +
      '/annotations/' +
      commons.escapeVariable('$annotationId');
  final response_ = await _requester.request(
    url_,
    'GET',
    queryParams: queryParams_,
  );
  return Volumeannotation.fromJson(
      response_ as core.Map<core.String, core.dynamic>);
}