docs: public static boolean isInstance(Object obj, String interfaceClazzName) {
  		for (Class<?> clazz = obj.getClass(); clazz != null
  				&& !clazz.equals(Object.class); clazz = clazz.getSuperclass()) {
  			Class<?>[] interfaces = clazz.getInterfaces();
  			for (Class<?> itf : interfaces) {
  				if (itf.getName().equals(interfaceClazzName)) {
  					return true;
  				}
  			}
  		}
  		return false;
  	}