code: def main(argv):
      del argv  # Unused.
      if FLAGS.action == "create_experiment":
          create_experiment()
      elif FLAGS.action == "start_session":
          start_session()
      elif FLAGS.action == "end_session":
          end_session()
      else:
          raise ValueError(
              "Invalid action requested: '%s'" % FLAGS.action
          )
  
file_path: tensorboard/tensorboard/plugins/hparams/hparams_util.py
imports: import getpass
  import time
  from absl import app
  from absl import flags
  from google.protobuf import struct_pb2
  from google.protobuf import text_format
  import tensorflow
  from tensorboard.plugins.hparams import api_pb2
  from tensorboard.plugins.hparams import hparams_util_pb2
  from tensorboard.plugins.hparams import summary
label_desc: Use image node_id 1 for calling a global function with example usage: main(argv) without return types