public SequenceValidationTranscodingStreamFactory(IPreviousEventHashReader previousEventHashReader, ITranscodingStreamFactory transcodingStreamFactory)
 {
     this.previousEventHashReader = previousEventHashReader;
     this.transcodingStreamFactory = transcodingStreamFactory;
 }
 public HashChecksumTranscodingStreamFactory(IStreamHashGenerator streamHashGenerator, ITranscodingStreamFactory transcodingStreamFactory)
 {
     this.streamHashGenerator = streamHashGenerator;
     this.transcodingStreamFactory = transcodingStreamFactory;
 }