@JsonIgnore
    public Map<String, Map<String, String>> getPropertyAttributesAsMap() {
      ObjectMapper mapper = new ObjectMapper();
      return null == propertyAttributes ? null :
        ConfigurableHelper.transformAttributesMap( transformValues(propertyAttributes, vaInfo -> vaInfo.toMap(Optional.of(mapper))) );
    }
@return value attributes in <i>attribute name -> property name -> value</i> format
ambari-server/src/main/java/org/apache/ambari/server/api/services/stackadvisor/recommendations/RecommendationResponse.java