code: public static PropertyResolver createResolver(PropertyRetriever instanceRetriever,
              PropertyRetriever projectRetriever, PropertyRetriever frameworkRetriever) {
          return new RuntimePropertyResolver(instanceRetriever, projectRetriever, frameworkRetriever);
      }
docs: @return Create a resolver from a set of retrievers, possibly null
  
  @param instanceRetriever retriever for instance properties
  @param projectRetriever retriever for project properties
  @param frameworkRetriever retriever for framework properties