code: def guess_function_name(next_line, regexps=FUNCTION_REGEXPS):
      
      for regexp in regexps:
          match = re.search(regexp, next_line)
          if match:
              return match.group(1)
      return None
docs: Attempt to determine the function name from the first code line
      following the comment.  The patterns recognized are described by
      `regexps`, which defaults to FUNCTION_REGEXPS.  If a match is successful, 
      returns the function name.  Otherwise, returns None.