code: def batchify(self, iterators: Dict[str, Iterator]):
      pass
  
imports: from collections.abc import Iterator
  from typing import Dict, Optional
  import numpy
  from pytext.config.component import Component, ComponentType
label_desc: Use image node_id 3 for calling the BaseBatchSampler obj's underlying member method code with example usage: obj.batchify(iterators) without return types