Changes a given `changed_fields` on each object in a given `iterable`, saves objects
    and returns the changed objects.

def bulk_change_and_save(iterable, update_only_changed_fields=False, save_kwargs=None, **changed_fields):
    """
    Changes a given `changed_fields` on each object in a given `iterable`, saves objects
    and returns the changed objects.
    """
    return [
        change_and_save(obj, update_only_changed_fields=update_only_changed_fields, save_kwargs=save_kwargs,
                        **changed_fields)
        for obj in iterable
    ]