code: def get_initialized_tpu_systems():
      """Returns all currently initialized tpu systems.
  
      Returns:
         A dictionary, with tpu name as the key and the tpu topology as the value.
      """
      return _INITIALIZED_TPU_SYSTEMS.copy()
  
file_path: tensorflow/tensorflow/python/tpu/tpu_strategy_util.py
imports: import gc
  from tensorflow.core.protobuf import config_pb2
  from tensorflow.python.client import session
  from tensorflow.python.distribute.cluster_resolver import cluster_resolver
  from tensorflow.python.eager import context
  from tensorflow.python.eager import def_function
  from tensorflow.python.eager import monitoring
  from tensorflow.python.framework import device
  from tensorflow.python.framework import errors
  from tensorflow.python.framework import ops
  from tensorflow.python.platform import tf_logging
  from tensorflow.python.tpu import topology
  from tensorflow.python.tpu import tpu
  from tensorflow.python.util import compat
label_desc: Use image node_id 2 for calling a global function with example usage: get_initialized_tpu_systems() and returns: _INITIALIZED_TPU_SYSTEMS