data to the target consumer, ignoring encoding.
The encoding does not apply to this method, and the
data list is passed
directly to the target consumer as a stream event.
This function must not be called when a stream is currently being added using addStream.
This operation is non-blocking. See flush or done for how to get any errors generated by this call.
The data list should not be modified after it has been passed to
void add(List<int> data);