code: private ErrorDetectingWrapper createUnmappedChain() {
  		int nextIndex = this.graphRequests.size();
  
  		return
  			new ErrorDetectingWrapper(
  				new GraphNodeExtractor(nextIndex, this.mapper,
  					new ErrorDetectingWrapper(this)));
  	}
docs: Creates the common chain of wrappers that will select out one graph request
  from the batch and error check it both at the batch level and at the individual
  request level.  Result will be an unmapped JsonNode.