def METHOD_NAME(sender, instance, created, **kwargs):
    """
    Populate swimlanes with SwimlaneUserStoryStatus objects when a new UserStoryStatus is created.
    """
    if not created:
        return
    SwimlaneUserStoryStatus = apps.get_model("projects", "SwimlaneUserStoryStatus")
    copy_from_main_status = instance.project.swimlanes.count() == 1
    objects = (
        SwimlaneUserStoryStatus(
            swimlane=swimlane,
            status=instance,
            wip_limit=instance.wip_limit if copy_from_main_status else None
        )
    for swimlane in instance.project.swimlanes.all())
    SwimlaneUserStoryStatus.objects.bulk_create(objects)