code: public static <T extends QueryAnswerExplanation>
            QueryAnswerExplanationService<T> findExplanationService(
                    QueryAnswer answer,
                    QueryAnswerExplanationSpecification<T> spec) {
      //return getLoader().findExplanationService(answer, spec);
      return getLoader().getQueryApiService().findExplanationService(getLoader(), answer, spec);
    }
docs: ====|    Getters: Queries, Explanations, ProofViews    |======================================//