import { MonoTypeOperatorFunction } from 'rxjs';
import { PollConfig } from './types/config.type';
import { Nil } from './types/utils.type';
/**
 * ### RxJS Poll Operator
 *
 * Automatically re-executes a source observable after completion, \
 * using delay strategies and retry mechanisms for handling errors.
 *
 * #### Example
 *
 * ```ts
 * import { poll } from 'rxjs-poll';
 * import { takeWhile } from 'rxjs';
 *
 * request$
 *   .pipe(
 *     poll(),
 *     takeWhile(({ status }) => status !== 'done', true)
 *   )
 *   .subscribe();
 * ```
 *
 * @param config - {@link PollConfig} object used for configuration
 * @returns Function that returns an Observable handling resubscription \
 * to the source on complete or error
 */
export declare function poll<T>(config?: PollConfig<T> | Nil): MonoTypeOperatorFunction<T>;
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