code: def __init__(self, keys):
      super().__init__(keys)
      self.fwd_fn = lambda x: x * 2
  
imports: from __future__ import annotations
  import unittest
  from copy import deepcopy
  import numpy
  import torch
  from parameterized import parameterized
  import monai.transforms.intensity.array
  import monai.transforms.spatial.array
  import monai.transforms.spatial.dictionary
  from monai.data import MetaTensor
  from monai.transforms import InvertibleTransform, OneOf, RandScaleIntensity, RandScaleIntensityd, RandShiftIntensity, RandShiftIntensityd, Resize, Resized, Transform
  from monai.transforms.compose import Compose
  from monai.transforms.transform import MapTransform
  from monai.utils.enums import TraceKeys
label_desc: Use image node_id 1 to create a new NonInv object from inherited base classes: MapBase with example: obj = NonInv(keys)