ping method
Sends ping and completes when the peer answers.
The result is empty by definition; this is a liveness probe, so the value
is that it returned at all. 2026-07-28 has no ping: refused here
(-32601) rather than asked of a server that cannot answer it.
Implementation
@override
Future<void> ping({Map<String, dynamic>? meta, RequestOptions? options}) =>
inner.ping(meta: meta, options: options);