function defaultMessage(key, option) {
  const vbind = key.name.rawName === ':' ? '' : 'v-bind'
  const arg =
    key.argument != null && key.argument.type === 'VIdentifier'
      ? `:${key.argument.rawName}`
      : ''
  const mod =
    option.modifiers.length > 0 ? `.${option.modifiers.join('.')}` : ''
  let on = ''
  if (option.useElement) {
    on = ` on \`<${key.parent.parent.parent.rawName}>\``
  }
  return `Using \`${vbind + arg + mod}\`${on} is not allowed.`
}
@param {VDirectiveKey} key
@param {ParsedOption} option