code: def initialized(self):
      return self._initialized
  
imports: import warnings
  import numpy
  import mxnet
  from collections import defaultdict
  from mxnet.gluon import Parameter
  from mxnet.util import use_np
  from typing import Iterable, Optional, Tuple
  from collections import OrderedDict
  from mxnet.gluon.utils import shape_is_known
label_desc: Use image node_id 4 for calling the AverageSGDTracker obj's underlying member method code with example usage: obj.initialized() and returns: self