docs: public static void setDnsCache(Properties properties) {
          for (Map.Entry<Object, Object> entry : properties.entrySet()) {
              final String host = (String) entry.getKey();
              String ipList = (String) entry.getValue();
  
              ipList = ipList.trim();
              if (ipList.isEmpty()) continue;
  
              final String[] ips = COMMA_SEPARATOR.split(ipList);
              setDnsCache(host, ips);
          }
      }