public async ValueTask StartTrackingAsync(
Solution solution,
CancellationToken cancellationToken
)
{
var newSession = new TrackingSession(_workspace, _spanProvider);
if (Interlocked.CompareExchange(ref _session, newSession, null) != null)
{
newSession.EndTracking();
Contract.Fail("Can only track active statements for a single edit session.");
}
await newSession
.TrackActiveSpansAsync(solution, cancellationToken)
.ConfigureAwait(false);
TrackingChanged?.Invoke();
}