code: def multi_gray2d_setup():
      old_imgs = gray2d_setup()
      images = {}
      for k, v in old_imgs.items():
          images[k + "_2imgs"] = [v, v]
          images[k + "_3imgs"] = [v, v, v]
          images[k + "_4imgs"] = [v, v, v, v]
      return images
  
file_path: pywick/tests/unit/transforms/test_image_transforms.py
imports: import torch
  from pywick.transforms import Grayscale, RandomGrayscale, Gamma, RandomGamma, RandomChoiceGamma, Brightness, RandomBrightness, RandomChoiceBrightness, Saturation, RandomSaturation, RandomChoiceSaturation, Contrast, RandomContrast, RandomChoiceContrast
label_desc: Use image node_id 2 for calling a global function with example usage: multi_gray2d_setup() and returns: images