code: public boolean isGuiceConstructorInjected(Class<?> c) {
          for (Constructor<?> con : c.getDeclaredConstructors()) {
              if (isInjectable(con)) {
                  return true;
              }
          }
  
          return false;
      }
docs: Determine if a class is an implicit Guice component that can be
  instantiated by Guice and the life-cycle managed by Jersey.
  
  @param c the class.
  @return true if the class is an implicit Guice component.