code: def submit_if_ready(args, submit_args, config):
      
      __, ext = os.path.splitext(args.input_file)
      if ext.lower() != ".xml":
          return None
  
      with io.open(args.input_file, encoding="utf-8") as input_file:
          xml = input_file.read(1024)
  
      if not ("<testsuites" in xml or "<testcases" in xml or "<requirements" in xml):
          return None
  
      if args.no_submit:
          logger.info("Nothing to do")
          return 0
  
      # expect importer xml and just submit it
      response = dump2polarion.submit_and_verify(
          xml_file=args.input_file, config=config, **submit_args
      )
      return 0 if response else 2
docs: Submits the input XML file if it's already in the expected format.