import { type Signal, type WritableSignal } from "@angular/core";
import "@simplysm/core-common";
export interface ExpandItemDef<T> {
    item: T;
    parentDef: ExpandItemDef<T> | undefined;
    hasChildren: boolean;
    depth: number;
}
export declare function useExpandingManager<T>(binding: {
    items: Signal<T[]>;
    expandedItems: WritableSignal<T[]>;
    getChildrenFn: Signal<((item: T, index: number) => T[] | undefined) | undefined>;
    sort: (items: T[]) => T[];
}): {
    displayItems: Signal<T[]>;
    hasExpandable: Signal<boolean>;
    isAllExpanded: Signal<boolean>;
    toggle(item: T): void;
    toggleAll(): void;
    isVisible(item: T): boolean;
    def(item: T): ExpandItemDef<T>;
};
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