code: def invalid_sub_method(foo, bar):
      return foo * bar
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  from absl.testing import absltest
  from model_search import registry
label_desc: Use image node_id 3 for calling a global function with example usage: invalid_sub_method(foo, bar) and returns: unknown