try {
final var results = m.joinGroup(linkUrl);
var newGroupId = results.first();
- if (outputWriter instanceof JsonWriter) {
- final var writer = (JsonWriter) outputWriter;
+ if (outputWriter instanceof JsonWriter writer) {
if (!m.getGroup(newGroupId).isMember()) {
writer.write(Map.of("groupId", newGroupId.toBase64(), "onlyRequested", true));
} else {