public Pair<Map<String, Map<String, String>>, Map<String, Map<String, Map<String, String>>>> asPair() {
    return Pair.of(properties, attributes);
  }
@return this configuration's properties and attributes as a pair of maps,
in order to be able to pass around more easily without polluting non-topology code with the Configuration object
ambari-server/src/main/java/org/apache/ambari/server/topology/Configuration.java