/**
 * Async wait for a variable till it gets defined in a parent
 *
 * Note: If you intend to use on the server, pass the appropriate parent.
 *
 * Usage Example: Waiting for async window.AppleID var to be initialized
 * - eg: `waitForVar('AppleID').then(AppleID => AppleID.init())`
 * - eg: `waitForVar('AppleID', { pollFrequency: 500, retries: 2, parent: window || global }).then(AppleID => AppleID.init())`
 */
declare const waitForVar: <Response_1, Parent = void>(name: string, { pollFrequency, retries: inRetries, parent, }?: {
    pollFrequency?: number | undefined;
    retries?: number | undefined;
    parent?: Window | Parent | undefined;
}) => Promise<Response_1 | null>;
export default waitForVar;