def METHOD_NAME(self, x):
    """Rewrite `forward` for default backend.
    This function uses the specific `forward` function for the BBoxHead
    or ConvFCBBoxHead after adding marks.
    Args:
        ctx (ContextCaller): The context with additional information.
        self: The instance of the original class.
        x (Tensor): Input image tensor.
    Returns:
        tuple(Tensor, Tensor): The (cls_score, bbox_pred). The cls_score
        has shape (N, num_det, num_cls) and the bbox_pred has shape
        (N, num_det, 4).
    """
    ctx = FUNCTION_REWRITER.get_context()
    @mark(
        'bbox_head_forward',
        inputs=['bbox_feats'],
        outputs=['cls_score', 'bbox_pred'])
    def __forward(self, x):
        return ctx.origin_func(self, x)
    return __forward(self, x)