import type { PreviewViewportSetting } from "@t3tools/contracts"; import { browserViewportSettingKey } from "~/browser/browserViewportLayout"; export function shouldRollbackPreviewViewport(  previous: PreviewViewportSetting,  requested: PreviewViewportSetting,  latest: PreviewViewportSetting,  operationServerEpoch: string | null,  currentServerEpoch: string | null,): boolean {  const requestedKey = browserViewportSettingKey(requested);  return (    currentServerEpoch === operationServerEpoch &&    browserViewportSettingKey(latest) === requestedKey &&    browserViewportSettingKey(previous) !== requestedKey  );}