pubAddr method
Implementation
void pubAddr(MultiAddr addr) {
  final addrKey = addr.toString();
  if (_sent.contains(addrKey)) {
    return;
  }
  _sent.add(addrKey);
  _controller.add(addr);
}void pubAddr(MultiAddr addr) {
  final addrKey = addr.toString();
  if (_sent.contains(addrKey)) {
    return;
  }
  _sent.add(addrKey);
  _controller.add(addr);
}