docs: @Nonnull
  	public <V1 extends T1, V2 extends T2> LToFltBiFunctionBuilder<T1, T2> aCase(Class<V1> argC1, Class<V2> argC2, LToFltBiFunction<V1, V2> function) {
  		PartialCaseWithFltProduct.The pc = partialCaseFactoryMethod((a1, a2) -> (argC1 == null || argC1.isInstance(a1)) && (argC2 == null || argC2.isInstance(a2)));
  
  		pc.evaluate(function);
  		return self();
  	}