docs: public static PartitionReducerProxy createPartitionReducerProxy(String id, InjectionReferences injectionRefs, RuntimeStepExecution stepContext) throws ArtifactValidationException {
          PartitionReducer loadedArtifact = (PartitionReducer)loadArtifact(id, injectionRefs);
          PartitionReducerProxy proxy = new PartitionReducerProxy(loadedArtifact);
          proxy.setStepContext(stepContext);
  
          return proxy;
      }