keys method
Returns a Promise that resolves to an array of Cache keys.
Implementation
Future<List<Request>> keys([Request? request, CacheOptions? options]) {
List params = [];
if (request != null) {
params.add(_wrapRequest(request));
if (options != null) {
params.add(options);
}
}
return promiseToFuture<List, List<Request>>(
_callMethod(_delegate, 'keys', params),
(List list) =>
list.map<Request>((item) => Request._(item as Object)).toList());
}