code: func NewFilteredBlockEvent(fblock *pb.FilteredBlock, sourceURL string) *connection.Event {
  	return connection.NewEvent(
  		&pb.DeliverResponse{
  			Type: &pb.DeliverResponse_FilteredBlock{
  				FilteredBlock: fblock,
  			},
  		}, sourceURL,
  	)
  }
docs: // NewFilteredBlockEvent returns a new mock filtered block event initialized with the given filtered block