def __init__(self, initial_tagger, rules, training_stats=None):
        self._initial_tagger = initial_tagger
        self._rules = tuple(rules)
        self._training_stats = training_stats
Helper function to wait for a given volume to change state
dataset/ETHPy150Open nltk/nltk/nltk/tag/brill.py/BrillTagger.__init__--crossover with--dataset/ETHPy150Open ClusterHQ/flocker/flocker/node/agents/ebs.py/_wait_for_volume_state_change