type NativePage = {
    data: Record<string, unknown>;
};
declare const pageHmrStateKey: unique symbol;
type PageHmrState = {
    /** True only across the unload/load/show sequence triggered by one native re-registration. */
    isReregistering: boolean;
    /** The Page bound to `this` by ordinary onLoad, retained until ordinary onUnload. */
    mountedPage: NativePage | undefined;
};
type HmrPageConfig = {
    data: Record<string, unknown>;
    onUnload?: unknown;
    onLoad?: unknown;
    onShow?: unknown;
    [pageHmrStateKey]?: PageHmrState;
};
/** Tracks the mounted native Page and prepares its static config for DevTools re-registration. */
export declare function injectPageHmr(config: HmrPageConfig): HmrPageConfig;
export {};