import type { IframeResponseEvent } from "../Events/IframeEvent";
export declare const registeredCallbacks: {
    [K in IframeResponseEvent["type"]]?: ((event: Extract<IframeResponseEvent, {
        type: K;
    }>["data"]) => void)[];
};
export declare function apiCallback<T extends IframeResponseEvent["type"]>(callbackData: {
    type: T;
    callback: (event: Extract<IframeResponseEvent, {
        type: T;
    }>["data"]) => void;
}): {
    type: T;
    callback: (event: Extract<IframeResponseEvent, {
        type: T;
    }>["data"]) => void;
};