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