code: @NullSafe
    private static <T extends Comparable<T>> boolean areNotComparable(T obj1, T obj2) {
      return obj1 == null || obj2 == null || obj1.compareTo(obj2) != 0;
    }
docs: Evaluates the given {@link Comparable Comparable objects} to determine whether they are equal by comparison.
  
  @param <T> {@link Comparable Comparable class type} of the given {@link Object objects}.
  @param obj1 {@link Object} to compare for equality with {@link Object object 2}.
  @param obj2 {@link Object} to compare for equality with {@link Object object 1}.
  @return a boolean value indicating whether the given {@link Comparable Comparable objects}
  to determine whether they are equal by comparison.
  @see java.lang.Comparable#compareTo(Object)