import type { Reducer } from "./api.js";
/**
 * Reducer which ignores incoming values and instead only counts them,
 * optionally using given `start` and `step` counter values.
 *
 * @param offset -
 * @param step -
 */
export declare function count(offset?: number, step?: number): Reducer<any, number>;
export declare function count(src: Iterable<any>): number;
export declare function count(offset: number, src: Iterable<any>): number;
export declare function count(offset: number, step: number, src: Iterable<any>): number;
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