code: def warn(*args):
      """
      Prints **args** to standard error when running completions. This will interrupt the user's command line interaction;
      use it to indicate an error condition that is preventing your completer from working.
      """
      print(file=debug_stream)
      print(file=debug_stream, *args)
  
imports: import contextlib
  import os
  import sys
label_desc: Use image node_id 4 for calling a global function with example usage: warn() without return types