code: protected MediaType getMostSpecificMediaType(MediaType acceptType, MediaType produceType) {
          produceType = produceType.copyQualityValue(acceptType);
  
          return MediaType.SPECIFICITY_COMPARATOR.compare(acceptType, produceType) <= 0 ? acceptType : produceType;
      }
docs: Return the more specific of the acceptable and the producible media types with the q-value of the former.