quality property
The latest connection quality: smoothed round-trip latency, and the
level it falls into per RealtimeConfig.quality.
Measured from invocations the server answers and, on transports with a
client-side heartbeat, from pings. On ASP.NET Core SignalR only
invocations count, so it stays unknown until something is invoked. It
resets to unknown whenever the connection is lost.
Implementation
@override
RealtimeConnectionQuality get quality => _quality;