function getExpectedStyle(options, node) {
  const { argument } = node.key

  if (
    argument == null ||
    (argument.type === 'VIdentifier' && argument.name === 'default')
  ) {
    const element = node.parent.parent
    return element.name === 'template' ? options.default : options.atComponent
  }
  return options.named
}
Get the expected style.
@param {Options} options The options that defined expected types.
@param {VDirective} node The `v-slot` node to check.
@returns {"shorthand" | "longform" | "v-slot"} The expected style.