code: public void reuse(Subscriber<? super PooledConnection<R, W>> connectionSubscriber) {
          unsafeNettyChannel().pipeline().fireUserEventTriggered(new ConnectionReuseEvent<>(connectionSubscriber, this));
      }
docs: This method must be called for reusing the connection i.e. for sending this connection to the passed subscriber.
  
  @param connectionSubscriber Subscriber for the pooled connection for reuse.