class_docstr: Immutable `Mapping`.
code: def __len__(self):
      return len(self._dict)
  
file_path: tensorflow-upstream/tensorflow/python/framework/immutable_dict.py
imports: import collections.abc
label_desc: Use image node_id 5 for calling the ImmutableDict obj's underlying member method code with example usage: obj.__len__() and returns: len