/**
 * The messages the extension's page runtime and its ISOLATED-world relay
 * trade about saved overrides (see `window-override-storage.ts`). Free of
 * imports, so the relay can take it without the inspector.
 */
/** Marks the relay's override traffic among other `postMessage` traffic. */
export declare const OVERRIDES_SOURCE = "@oddsquad/vite-plugin-lit#overrides";
export type OverridesWindowMessage = {
    source: typeof OVERRIDES_SOURCE;
    type: 'want';
} | {
    source: typeof OVERRIDES_SOURCE;
    type: 'seed';
    json: string | null;
} | {
    source: typeof OVERRIDES_SOURCE;
    type: 'save';
    json: string;
};
/** The message in `event`, if it is override traffic from this window. */
export declare const overridesMessageOf: (event: MessageEvent, target: Window) => OverridesWindowMessage | undefined;
//# sourceMappingURL=overrides-window.d.ts.map