Function messagesContainString

packages/intl/create-intl.ts:32–38

(
  messages: Record<string, string> | Record<string, MessageFormatElement[]>
)

}

function messagesContainString(
  messages: Record<string, string> | Record<string, MessageFormatElement[]>
): messages is Record<string, MessageFormatElement[]> {
  const firstMessage = messages ? messages[Object.keys(messages)[0]] : undefined

  return typeof firstMessage === 'string'
}

function verifyConfigMessages<T = string>(config: IntlConfig<T>) {
  if (