code: def for_with_call(l, fn):
      s = 0
      for i in l:
          s = s * 10 + fn(i)
      return s
  
imports: import itertools
  from absl.testing import parameterized
  import tensorflow
  from tensorflow.python.autograph.tests import reference_test_base
label_desc: Use image node_id 6 for calling a global function with example usage: for_with_call(l, fn) and returns: s