docs: @Override
      public String getHostnameForHostID(int hostId) {
          if (hostId == m_localHostId) {
              return CoreUtils.getHostnameOrAddress();
          }
          Iterator<ForeignHost> it = m_foreignHosts.get(hostId).iterator();
          if (it.hasNext()) {
              ForeignHost fh = it.next();
              return fh.hostname();
          }
          return m_knownFailedHosts.get(hostId) != null ? m_knownFailedHosts.get(hostId) :
                  "UNKNOWN";
      }