class_docstr: Map anything to emptiness.
class_docstr_tok: ["Map","anything","to","emptiness","."]
code: def __init__(self, dataset):
      self.ds = dataset
  
imports: import logging
  import numpy
  from itertools import count
  from typing import List, Tuple
  import torch
  import tqdm
  from fvcore.common.timer import Timer
  from detectron2.utils import comm
  from .build import build_batch_data_loader
  from .common import DatasetFromList, MapDataset
  from .samplers import TrainingSampler
label_desc: Use image node_id 1 to create a new _EmptyMapDataset object from inherited base classes: torch.utils.data with example: obj = _EmptyMapDataset(dataset)