public String getPropertyBuilderMethodParameters() {
      return propertyBuilderMethod.getParameters().stream()
          .map(
              parameter -> TypeEncoder.encode(parameter.asType()) + " " + parameter.getSimpleName())
          .collect(joining(", "));
    }
The property builder method parameters, for example {@code Comparator<T> comparator}
value/src/main/java/com/google/auto/value/processor/PropertyBuilderClassifier.java