code: void notifyAcceptOutbind(Outbind outbind) throws IllegalStateException {
      this.lock.lock();
      try {
        if (this.request == null) {
          this.request = new OutbindRequest(outbind);
          this.requestCondition.signal();
        }
        else {
          throw new IllegalStateException("Already waiting for acceptance outbind");
        }
      }
      finally {
        this.lock.unlock();
      }
    }
docs: Notify that the outbind was accepted.
  
  @param outbind is the {@link Outbind} command.
  @throws IllegalStateException if this method already called before.