docs: def guess_parameters(next_line):
      """
      Attempt to guess parameters based on the presence of a parenthesized
      group of identifiers.  If successful, returns a list of parameter names;
      otherwise, returns None.
      """
      match = re.search('\(([\w\s,]+)\)', next_line)
      if match:
          return [arg.strip() for arg in match.group(1).split(',')]
      else:
          return None