final request = ListPostRequest(
  page: 1,
  perPage: 20,
  order: Order.asc,
);

final wpResponse = await client.posts.list(request);

// Handle response
final result = wpResponse.map(
    onSuccess: (response) {
      print(response.message);
      return response.data;
    },
    onFailure: (response) {
      print(response.error.toString());
      return <Post>[];
    },
);

// Dart 3 pattern matching
switch (wpResponse) {
  case WordpressSuccessResponse():
    final posts = wpResponse.data; // typed List<Post>
    break;
  case WordpressFailureResponse():
    final err = wpResponse.error;
    break;
}

// Expect success or throw a helpful error
final posts = (await client.posts.list(ListPostRequest(perPage: 10))).dataOrThrow();

// Convenience extension helpers also exist
final one = await client.posts.extensions.getById(123);