code: public static ResourceConstructor constructor(Class<?> annotatedResourceClass) {
          Constructor constructor = PickConstructor.pickPerRequestConstructor(annotatedResourceClass);
          if (constructor == null) {
              throw new RuntimeException("Could not find constructor for class: " + annotatedResourceClass.getName());
          }
          ResourceConstructorBuilder builder = rootResource(annotatedResourceClass).constructor(constructor);
          if (constructor.getParameterTypes() != null) {
              for (int i = 0; i < constructor.getParameterTypes().length; i++)
                  builder.param(i).fromAnnotations();
          }
          return builder.buildConstructor().buildClass().getConstructor();
      }
docs: Picks a constructor from an annotated resource class based on spec rules
  
  @param annotatedResourceClass
  @return