code: def buildkite_open_last(print_fn: Callable[[str], None] = print):
      buildkite_echo("^^^ +++", print_fn=print_fn)
  
imports: import os
  from typing import Optional, Callable
label_desc: Use image node_id 3 for calling a global function with example usage: buildkite_open_last(print_fn) without return types