/**
 * 根据展开级别获取所有需要展开的key
 */
export declare function getExpandKeyByLevel<T extends {
    children?: T[];
}>(data: T[], level: number, idKey: string): string[];
export declare function isTree<T extends {
    children?: T[];
}>(data: T[]): boolean;
export declare function searchAndMatch(value: string, q: string): void;
export declare function filterDataSource<T extends {
    children?: T[];
    parent?: T;
}>(data: T[], idKey: string, key: string, value: string, expandedKeys: string[]): T[];
export declare function findAndReplace<T extends {
    children?: T[];
}>(data: T[], newData: T, idKey: string): T[];
export declare function findAndReplaceWithReplacer<T extends {
    children?: T[];
}>(data: T[], idKey: string, id: any, replacer: (item: T) => T): T[];