export declare const flatten: <Node_1>(tree: Node_1[], childrenKey: string) => Node_1[];
export declare const unFlatten: <T>(list: T[], pIdKey: string, idKey: string, childrenKey: string, convert?: (node: T) => T) => T[];
export declare const dfsTree: <T, O>(tree: T[], idKey: string, childrenKey: string, cb: (node: T, parent: T, parentResult: O, path: string[]) => O) => void;