import { Path } from './path';
export declare type JSON = {
    [key: string]: any;
};
export declare type ChildResult = {
    pathToChild: string;
    child: Node;
};
export declare type ChildrenFinder = () => ChildResult[];
export declare const DefaultChildrenFinder: ChildrenFinder;
export declare type Node = {
    type: string;
    children: ChildrenFinder;
    toString?: () => string;
    validate?: () => void;
} & JSON;
export declare type SyncWalker = (path: Path, state?: JSON) => void;
export declare type AsyncWalker = (path: Path, state?: JSON) => Promise<void>;
export declare type Walker = SyncWalker | AsyncWalker;
export declare type NodeValidator = (node: Node) => boolean;
export declare const DefaultNodeValidator: NodeValidator;