import { Options } from "./types";
/**
 * Script-tag entry point. One live instance per page:
 *
 * - A repeat call with the same write key reuses the existing instance (or
 *   the one still initialising) and only runs the new `ready` callback.
 *   Tag managers, React strict mode, and hot reloads all call this twice,
 *   and a second instance would double every autocaptured event.
 * - A call with a different write key retires the previous instance first,
 *   so only one instance ever sends.
 * - An instance the app put on `window.formo` itself is adopted the same
 *   way, matched on its write key.
 */
export declare function formofy(writeKey: string, options?: Options): void;
/** @internal Forget the live instance. For tests only. */
export declare function _resetFormofy(): void;
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