code: public static boolean isHk2Contract(Injectee injectee) {
      Type type = injectee.getRequiredType();
      return isContact(type, org.jvnet.hk2.annotations.Contract.class);
    }
docs: Returns {@code true} if the {@link Injectee} has a HK2 SPI
  {@link org.jvnet.hk2.annotations.Contract} annotation.
  
  @see org.jvnet.hk2.annotations.Contract