onListRootsMap method
Map-based variant of onListRoots. The handler returns the raw
list of root maps (each with at least a uri key); this method
wraps it in the spec response shape. Sibling to
onSamplingRequestMap — same rationale.
Implementation
@override
void onListRootsMap(Future<List<Map<String, dynamic>>> Function() handler) =>
inner.onListRootsMap(handler);