class_docstr: iterator dataset initailizer 
class_docstr_tok: ["iterator","dataset","initailizer"]
code: def __init__(self, iterator, init_feed_dict):
      self._iterator = iterator
      self._init_feed_dict = init_feed_dict
  
imports: import delta.compat
  from bisect import bisect_right
  from absl import logging
label_desc: Use image node_id 1 to create a new DatasetInitializerHook object from inherited base classes: tf.estimator with example: obj = DatasetInitializerHook(iterator, init_feed_dict)