Unable to visualize augmented points

[S-Lyu]

First of all, thank you for your impressive work.
I would like to check how augmented points look compared to the original points.
I set vis = True to visualize multifindbestfit.py, but an error was caused.

python -m pcdet.datasets.multifindbestfit

  File "/root/projects/pg_rcnn/PG-RCNN/pcdet/datasets/multifindbestfit.py", line 201, in vis_pair
    vu.draw_scenes_multi([pnts_lst[0]], [colors_lst[0]], [size_lst[0]], [mode_lst[0]], bgcolor=(1, 1, 1), gt_boxes=None, ref_boxes=None)
AttributeError: module 'tools.visual_utils.visualize_utils' has no attribute 'draw_scenes_multi'

Can you please provide me with the code of function draw_scenes_multi?
Thank you in advance.