code: def _is_bound_method(fn):
      _, fn = tf_decorator.unwrap(fn)
      return tf_inspect.ismethod(fn) and (fn.__self__ is not None)
  
file_path: tensorflow/tensorflow/python/util/function_utils.py
imports: import functools
  from tensorflow.core.protobuf import config_pb2
  from tensorflow.python.util import tf_decorator
  from tensorflow.python.util import tf_inspect
label_desc: Use image node_id 1 for calling a global function with example usage: _is_bound_method(fn) and returns: unknown