code: def com_google_fonts_check_name_rfn(ttFont):
    
    failed = False
    for entry in ttFont["name"].names:
      string = entry.toUnicode()
      if "reserved font name" in string.lower():
        yield WARN, ("Name table entry (\"{}\")"
                     " contains \"Reserved Font Name\"."
                     " This is an error except in a few specific"
                     " rare cases.").format(string)
        failed = True
    if not failed:
      yield PASS, ("None of the name table strings"
                   " contain \"Reserved Font Name\".")
docs: Name table strings must not contain the string 'Reserved Font Name'.