code: def Grayscale_setup():
      tforms = {}
      tforms["grayscale_keepchannels"] = Grayscale(keep_channels=True)
      tforms["grayscale_dontkeepchannels"] = Grayscale(
          keep_channels=False
      )
  
      tforms["random_grayscale_nop"] = RandomGrayscale()
      tforms["random_grayscale_p_01"] = RandomGrayscale(0)
      tforms["random_grayscale_p_02"] = RandomGrayscale(0.5)
      tforms["random_grayscale_p_03"] = RandomGrayscale(1)
  
      return tforms
  
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 5 for calling a global function with example usage: Grayscale_setup() and returns: tforms