def METHOD_NAME(self, args, offset=0, limit=None, order=None, count=False):
    """Don't show by default children carriers."""
    if not self.env.context.get("show_children_carriers"):
        if args is None:
            args = []
        args += [("parent_id", "=", False)]
    return super(DeliveryCarrier, self).METHOD_NAME(
        args,
        offset=offset,
        limit=limit,
        order=order,
        count=count,
    )