As the construction heuristic definition is now supported, it's essential we provide a way how to specify difficulty comparator when using related CH types (e.g. FIRST_FIT_DECREASING).

Requirements:

• allow comparing on object fields (including nested objects) in lexicographic order (ascending/descending order)
• source generation should avoid using org.apache.commons.lang3.builder.CompareToBuilder, let's use methods available in java.util.Comparator instead

The screen could look like this:

Would might generate code like this:

    public int compare(Lecture o1, Lecture o2) {
        return Comparator
                .comparing((Lecture l) -> l.getCourse().getTeacher().getAge(), Comparator.reverseOrder())
                .thenComparing((Lecture l) -> l.getCourse().getStudentSize())
                .compare(o1, o2);
    }