optaplanner-examples/src/main/java/org/optaplanner/examples/common/domain/AbstractPersistable.java
@Override
    public int compareTo(AbstractPersistable other) {
        return new CompareToBuilder()
                .append(getClass().getName(), other.getClass().getName())
                .append(id, other.id)
                .toComparison();
    }
@Override
    public int compareTo(AbstractPersistable other) {
        return new CompareToBuilder()
                .append(getClass().getName(), other.getClass().getName())
                .append(id, other.id)
                .toComparison();
    }
Used by the GUI to sort the {@link ConstraintMatch} list
by {@link ConstraintMatch#getJustificationList()}.
@param other never null
@return comparison