import { IItem } from './types';
import { Optional } from '../../../types';
declare function getId(data: Optional<Pick<IItem, 'id' | 'label'>, 'id'>): string;
declare function isChild(parentId: string, childId: string): boolean;
declare function getItemsIds(items: Array<IItem>): Array<string>;
declare function getLevel(id: string): number;
declare function getChildren(id: string | undefined, items: Array<IItem>): IItem[];
export { getChildren, getId, getItemsIds, getLevel, isChild };
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