class_docstr: A node that prints hello world and exits.
docstr: Entry point.
docstr_tok: ["Entry","point","."]
code: def run(self) -> None:
      """Entry point."""
      print("Hello World!!!")
  
imports: from absl import app
  import launchpad
label_desc: Use image node_id 2 for calling the HelloWorld obj's underlying member method code with example usage: obj.run() without return types