code: def get_effective_source_map(self):
      return EMPTY_DICT
  
imports: import collections
  import inspect
  import threading
  from tensorflow.core.framework import graph_debug_info_pb2
  from tensorflow.python.util import _tf_stack
label_desc: Use image node_id 1 for calling the SentinelMapper obj's underlying member method code with example usage: obj.get_effective_source_map() and returns: EMPTY_DICT