code: def __init__(self) -> None:
      super().__init__()
      self._get_feature_flags_func = None
      self._is_feature_enabled_func = None
      self._feature_flags: dict[str, bool] = {}
  
imports: from copy import deepcopy
  from flask import Flask
label_desc: Use image node_id 1 to create a new FeatureFlagManager object  with example: obj = FeatureFlagManager()