docs: @Nonnull
  	public <V extends T> LConsumerBuilder<T> casesOf(Class<V> argC, Consumer<LConsumerBuilder<V>> pcpConsumer) {
  		PartialCase.The pc = partialCaseFactoryMethod(a -> (argC == null || argC.isInstance(a)));
  
  		pc.specifySubCases((Consumer) pcpConsumer);
  		return self();
  	}