docstr: Args:
      name (str): the name of the dataset split, e.g. "coco_train2017"
  
  Returns:
      DatasetSplit
code: def get(name):
      """
      Args:
          name (str): the name of the dataset split, e.g. "coco_train2017"
  
      Returns:
          DatasetSplit
      """
      assert (
          name in DatasetRegistry._registry
      ), "Dataset {} was not registered!".format(name)
      return DatasetRegistry._registry[name]()
  
file_path: tensorpack/examples/FasterRCNN/dataset/dataset.py
imports: from collections import defaultdict
label_desc: Use image node_id 2 for calling the DatasetRegistry obj's underlying member method code with example usage: obj.get(name) and returns: DatasetRegistry