export interface INode<T> {
    value: T;
    children: INode<T>[];
}
export declare function createNode<T>(ts: T[], t: T, getChildren: (ts: T[], t: T) => T[]): INode<T>;
export declare function traverseDepthFirst<T, R>(node: INode<T>, process: (t: T, rs: R[]) => R): R;