public SpanDispatchCallback(IButterflySenderProvider senderProvider, ILoggerFactory loggerFactory)
 {
     _butterflySender = senderProvider.GetSender();
     _logger          = loggerFactory.CreateLogger(typeof(SpanDispatchCallback));
     _filter          = token => token == DispatchableToken.SpanToken;
 }
 public SpanDispatchCallback(IButterflySenderProvider senderProvider)
 {
     _butterflySender = senderProvider.GetSender();
     _filter          = token => token == DispatchableToken.SpanToken;
 }