docs: @Nullable
      public Peer connectToLocalHost() {
          lock.lock();
          try {
              final PeerAddress localhost = PeerAddress.localhost(params);
              backoffMap.put(localhost, new ExponentialBackoff(peerBackoffParams));
              return connectTo(localhost, true, vConnectTimeoutMillis);
          } finally {
              lock.unlock();
          }
      }