code: def main(unused_argv):
      writer = tf.summary.create_file_writer("demo_logs")
      with writer.as_default():
          summary_v2.greeting(
              "guestbook",
              "Alice",
              step=0,
              description="Sign your name!",
          )
          summary_v2.greeting(
              "guestbook", "Bob", step=1
          )  # no need for `description`
          summary_v2.greeting("guestbook", "Cheryl", step=2)
          summary_v2.greeting("more_names", "David", step=4)
  
imports: from absl import app
  import tensorflow
  from tensorboard_plugin_example import summary_v2
label_desc: Use image node_id 1 for calling a global function with example usage: main(unused_argv) without return types