RegisterNERtcSubChannelEventSink function
Implementation
void RegisterNERtcSubChannelEventSink(
String channelTag, NERtcSubChannelEventSink subEventSink) {
if (sub_channel_sinks.containsKey(channelTag)) {
print("channel $channelTag sink is exist.");
return;
}
sub_channel_sinks[channelTag] = subEventSink;
}