export type TFuseAPICallbackHandler = (data: string) => void;
/**
 * A singleton manager to manage native callbacks.
 *
 * Create a callback context and pass the return context id to native clients,
 * in which they can use to respond back.
 *
 * Note that plugin APIs are far more efficient and can handle a diverse set of data,
 * including large payloads, so when possible it's best to use a plugin API instead of a
 * callback API.
 *
 * This callback API is however, useful for building listener kind of services where the native
 * needs to continously callback to the webview with small data packets.
 */
export declare class FuseCallbackManager {
    private static $instance;
    private constructor();
    static getInstance(): FuseCallbackManager;
    createCallback(cb: TFuseAPICallbackHandler): string;
    releaseCallback(id: string): void;
}