code: def bbox_vflip(
      bbox: BoxInternalType, rows: int, cols: int
  ) -> BoxInternalType:  # skipcq: PYL-W0613
      """Flip a bounding box vertically around the x-axis.
  
      Args:
          bbox: A bounding box `(x_min, y_min, x_max, y_max)`.
          rows: Image rows.
          cols: Image cols.
  
      Returns:
          tuple: A bounding box `(x_min, y_min, x_max, y_max)`.
  
      """
      x_min, y_min, x_max, y_max = bbox[:4]
      return x_min, 1 - y_max, x_max, 1 - y_min
  
imports: import math
  from typing import List, Optional, Sequence, Tuple, Union
  import cv2
  import numpy
  import skimage.transform
  from scipy.ndimage import gaussian_filter
  from albumentations.augmentations.utils import _maybe_process_in_chunks, angle_2pi_range, clipped, preserve_channel_dim, preserve_shape
  from ...None import random_utils
  from ...core.bbox_utils import denormalize_bbox, normalize_bbox
  from ...core.transforms_interface import BoxInternalType, FillValueType, ImageColorType, KeypointInternalType
label_desc: Use image node_id 39 for calling a global function with example usage: bbox_vflip(bbox, rows, cols) and returns: x_min,  unknown,  x_max,  unknown