/*!
 * Copyright (c) Microsoft. All rights reserved.
 * Licensed under the MIT license. See LICENSE file in the project.
 */
import type { JoinArgs, Step } from '@data-wrangling-components/core';
export declare function useLeftColumn(step: Step<JoinArgs>): string | undefined;
export declare function getLeftColumn(step: Step<JoinArgs>): string | undefined;
export declare function useRightColumn(step: Step<JoinArgs>): string | undefined;
export declare function getRightColumn(step: Step<JoinArgs>): string | undefined;
