/*!
 * Copyright (c) Microsoft Corporation.
 * Licensed under the MIT License.
 */
export declare class TreeHelper {
    static parentChildren(ids: Uint32Array, parentIds: Uint32Array, childIds: Uint32Array): {
        rootIds: number[];
        indices: {
            [key: number]: number;
        };
        children: {
            [key: number]: number[];
        };
        degrees: Uint32Array;
    };
    static tree(rootId: number, indices: {
        [key: number]: number;
    }, children: {
        [key: number]: number[];
    }, positions: Float64Array | number[], widths: Float64Array | number[], descendents: Uint32Array, depths: Uint32Array): {
        ids: Uint32Array;
        maxDescendents: number;
        maxPosition: number;
    };
}