add abstract method
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 method must not be called when a stream is currently being added using addStream.
The data list should not be modified after it has been passed to
because it is not defined whether the target consumer will receive the
list in the original or modified state.
Individual values in
data which are not in the range 0 .. 255 will be
truncated to their low eight bits, as if by int.toUnsigned, before being
void add(List<int> data);