code: private List<String> extractList(Map<String, String> pAgentConfig, String pKey) {
          List<String> ret = new ArrayList<String>();
          if (pAgentConfig.containsKey(pKey)) {
              ret.add(pAgentConfig.get(pKey));
          }
          int idx = 1;
          String keyIdx = pKey + "." + idx;
          while (pAgentConfig.containsKey(keyIdx)) {
              ret.add(pAgentConfig.get(keyIdx));
              keyIdx = pKey + "." + ++idx;
          }
          return ret.size() > 0 ? ret : null;
      }
docs: More elements can be given with ".1", ".2", ... added.