import type { ThreadGenerator } from '../threading';
/**
 * Wait for the given amount of time.
 *
 * @example
 * ```ts
 * // current time: 0s
 * yield waitFor(2);
 * // current time: 2s
 * yield waitFor(3);
 * // current time: 5s
 * ```
 *
 * @param seconds - The relative time in seconds.
 * @param after - An optional task to be run after the function completes.
 */
export declare function waitFor(seconds?: number, after?: ThreadGenerator): ThreadGenerator;
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