code: def Gamma_setup():
      tforms = {}
      tforms["gamma_<1"] = Gamma(value=0.5)
      tforms["gamma_=1"] = Gamma(value=1.0)
      tforms["gamma_>1"] = Gamma(value=1.5)
      tforms["random_gamma_01"] = RandomGamma(0.5, 1.5)
      tforms["random_gamma_02"] = RandomGamma(0.5, 1.0)
      tforms["random_gamma_03"] = RandomGamma(1.0, 1.5)
      tforms["random_choice_gamma_01"] = RandomChoiceGamma([0.5, 1.0])
      tforms["random_choice_gamma_02"] = RandomChoiceGamma(
          [0.5, 1.0], p=[0.5, 0.5]
      )
      tforms["random_choice_gamma_03"] = RandomChoiceGamma(
          [0.5, 1.0], p=[0.2, 0.8]
      )
  
      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 6 for calling a global function with example usage: Gamma_setup() and returns: tforms