docs: private void retainSuspectedMembers(MemberMap memberMap) {
          Iterator<Address> it = suspectedMembers.iterator();
          while (it.hasNext()) {
              Address suspectedAddress = it.next();
              if (!memberMap.contains(suspectedAddress)) {
                  if (logger.isFineEnabled()) {
                      logger.fine("Removing suspected address " + suspectedAddress + ", it's no longer a member.");
                  }
  
                  it.remove();
              }
          }
      }