public Task<PollResult> PollProperties(CancellationToken token)
{
if (!FirstTime) return EmptyResult;
FirstTime = false;
var result = new PollResult(this,
new Dictionary<string, object>(_configurations.ToDictionary(
v => v.Key.Replace(':', '.'),
v => ConvertJsonValue(v.Value)))
);
var t = Task.FromResult(result);
return t;
}