code: def main(_):
      control_flow_util.enable_control_flow_v2()
      write_graph(tfadd, FLAGS.out_dir)
      write_graph(tfadd_with_ckpt, FLAGS.out_dir)
      write_graph(tfadd_with_ckpt_saver, FLAGS.out_dir)
      write_graph(tfassert_eq, FLAGS.out_dir)
      write_graph(tfcond, FLAGS.out_dir)
      write_graph(tffunction, FLAGS.out_dir)
      write_graph(tfgather, FLAGS.out_dir)
      write_graph(tfmatmul, FLAGS.out_dir)
      write_graph(tfmatmulandadd, FLAGS.out_dir)
      write_graph(tfsplits, FLAGS.out_dir)
      write_graph(tftop_k, FLAGS.out_dir)
      write_graph(tfvariable, FLAGS.out_dir)
      write_graph(tfvariable_readonly, FLAGS.out_dir)
      write_graph(tfvariable_sequential_updates, FLAGS.out_dir)
  
imports: import argparse
  import os
  import sys
  from absl import app
  import six
  from six.moves import range
  from tensorflow.core.protobuf import saver_pb2
  from tensorflow.python.client import session
  from tensorflow.python.framework import constant_op
  from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import function
  from tensorflow.python.framework import ops
  from tensorflow.python.ops import array_ops
  from tensorflow.python.ops import array_ops_stack
  from tensorflow.python.ops import cond
  from tensorflow.python.ops import control_flow_assert
  from tensorflow.python.ops import control_flow_ops
  from tensorflow.python.ops import control_flow_util
  from tensorflow.python.ops import math_ops
  from tensorflow.python.ops import nn_ops
  from tensorflow.python.ops import variable_v1
  from tensorflow.python.ops import variables
  from tensorflow.python.training import saver
label_desc: Use image node_id 16 for calling a global function with example usage: main(_) without return types