code: def convert_2d_to_target_format(arrays, target):
      if target == "mask":
          return arrays[0] if len(arrays) == 1 else arrays
      if target == "image":
          return convert_2d_to_3d(arrays, num_channels=3)
      if target == "image_4_channels":
          return convert_2d_to_3d(arrays, num_channels=4)
  
      raise ValueError("Unknown target {}".format(target))
  
imports: import inspect
  import random
  import typing
  from io import StringIO
  from typing import Optional, Set, Type
  import numpy
  import albumentations
label_desc: Use image node_id 2 for calling a global function with example usage: convert_2d_to_target_format(arrays, target) and returns: unknown, convert_2d_to_3d, convert_2d_to_3d