private static void SetSpanAttributes(Activity activity, IOutgoingPhysicalMessageContext context, TelemetrySpan span)
{
span.SetAttribute("messaging.message_id", context.MessageId);
span.SetAttribute("messaging.message_payload_size_bytes", context.Body.Length);
span.ApplyContext(context.Builder.Build <ReadOnlySettings>(), context.Headers);
foreach (var tag in activity.Tags)
{
span.SetAttribute($"messaging.nservicebus.{tag.Key.ToLowerInvariant()}", tag.Value);
}
}