docs: private boolean addInactive(PeerAddress peerAddress) {
          lock.lock();
          try {
              // Deduplicate
              if (backoffMap.containsKey(peerAddress))
                  return false;
              backoffMap.put(peerAddress, new ExponentialBackoff(peerBackoffParams));
              inactives.offer(peerAddress);
              return true;
          } finally {
              lock.unlock();
          }
      }