code: def flowshow(flow, win_name="", wait_time=0):
      """Show optical flow.
  
      Args:
          flow (ndarray or str): The optical flow to be displayed.
          win_name (str): The window name.
          wait_time (int): Value of waitKey param.
      """
      flow = flowread(flow)
      flow_img = flow2rgb(flow)
      imshow(rgb2bgr(flow_img), win_name, wait_time)
  
file_path: lavis/lavis/common/annotator/uniformer/mmcv/visualization/optflow.py
imports: from __future__ import division
  import numpy
  from annotator.uniformer.mmcv.image import rgb2bgr
  from annotator.uniformer.mmcv.video import flowread
  from .image import imshow
label_desc: Use image node_id 1 for calling a global function with example usage: flowshow(flow, win_name, wait_time) without return types