function defaultMessage(node, option) {
  const key = node.key.rawName
  let value = ''
  if (option.useValue) {
    value = node.value == null ? '` set to `true' : `="${node.value.value}"`
  }

  let on = ''
  if (option.useElement) {
    on = ` on \`<${node.parent.parent.rawName}>\``
  }
  return `Using \`${key + value}\`${on} is not allowed.`
}
@param {VAttribute} node
@param {ParsedOption} option