code: @NullSafe
    @Override
    public int compare(T obj1, T obj2) {
      return compareIgnoreNull(obj1, obj2);
    }
docs: Compares two {@link Comparable} objects.
  
  @param obj1 left hand side {@link Comparable} operand in the comparison expression.
  @param obj2 right hand side {@link Comparable} operand in the comparison expression.
  @return the result of comparing the {@link Comparable} objects.
  @see org.cp.elements.util.ComparatorUtils#compareIgnoreNull(Comparable, Comparable)