class_docstr: A node that prints hello world and exits.
docstr: Initializes Hello World.
docstr_tok: ["Initializes","Hello","World","."]
code: def __init__(self) -> None:
      """Initializes Hello World."""
      pass
  
imports: from absl import app
  import launchpad
label_desc: Use image node_id 1 to create a new HelloWorld object  with example: obj = HelloWorld()