code: def target_transform_append(self, transform):
      if transform is None:
          return
      if self.target_transform is None:
          self.target_transform = transform
      else:
          self.target_transform = Compose(
              [self.target_transform, transform]
          )
  
imports: from torch.utils.data import ConcatDataset, Subset
  from torch.utils.data import Dataset
  from torchvision.transforms import Compose
label_desc: Use image node_id 2 for calling the Dataset obj's underlying member method code with example usage: obj.target_transform_append(transform) without return types