code: def unreachable_return(x):
      with tf.name_scope(""):
          if x > 0:
              if x < 5:
                  with tf.name_scope(""):
                      return x
              else:
                  return x * x
          else:
              return x * x * x
      return x * x * x * x
  
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 7 for calling a global function with example usage: unreachable_return(x) and returns: unknown, unknown, unknown, x