code: def external_namedtuple(x, nt):
      return nt(a=1, b=x)
  
file_path: tensorflow-upstream/tensorflow/python/autograph/tests/call_to_named_tuple_test.py
imports: import collections
  import tensorflow.compat.v1
  from tensorflow.python.autograph.tests import reference_test_base
label_desc: Use image node_id 2 for calling a global function with example usage: external_namedtuple(x, nt) and returns: nt