import { Signal, WritableSignal } from "@angular/core";
export declare function setupCumulateSelectedKeys<T, K>(options: {
    items: Signal<T[]>;
    selectedItems: WritableSignal<T[]>;
    selectedItemKeys: WritableSignal<K[]>;
    selectMode: () => "single" | "multi" | undefined;
    keySelectorFn: (item: T, index: number) => K;
}): void;