code: @NullSafe
    private static boolean areNotEqual(Object obj1, Object obj2) {
      return obj1 == null || !obj1.equals(obj2);
    }
docs: Evaluate the given {@link Object objects} or equality.
  
  @param obj1 {@link Object} to evaluate for equality with {@link Object object 1}.
  @param obj2 {@link Object} to evaluate for equality with {@link Object object 2}.
  @return a boolean value indicating whether the given {@link Object objects} are equal.
  @see java.lang.Object#equals(Object)