code: public static <I, O> MealyCacheOracle<I, O> createDAGCache(Alphabet<I> alphabet,
                                                                 MembershipOracle<I, Word<O>> mqOracle) {
          return MealyCacheOracle.createDAGCacheOracle(alphabet, mqOracle);
      }
docs: Creates a cache oracle for a Mealy machine learning setup, using a DAG for internal cache organization.
  
  @param alphabet
  the input alphabet
  @param mqOracle
  the membership oracle
  
  @return a Mealy learning cache with a DAG-based implementation