Can't apply method addComplement on an NLGElement

Question

I see from this documentation that we can apply the method addComplement on an NLGElement, but when I try this code:

Lexicon lexicon= new XMLLexicon();
NLGFactory factory = new NLGFactory(lexicon);
NLGElement s1 = factory.createSentence("my dog is happy");
s1.addComplement("with me");

I got the following error:

The method addComplement() is undefined for the type NLGElement

So can anyone explain and help if there is an other alternative to add complement on an NLGElement

Answer 1

It seems that the doc is wrong, so what I want to do is not possible. But there is another possibility to add complement from this post