import type { Reducer } from "./api.js";
/**
 * Reducer. Special version of {@link push}, which immutably appends inputs to
 * an array, yielding a new array for each reduction step.
 *
 * @remarks
 * Also see {@link pushKeys}, {@link pushSort}.
 */
export declare const pushCopy: <T>() => Reducer<T, T[]>;
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