import { AbstractCommand } from '../AbstractCommand';
import { Document } from '../../core/models/Document';
import { NodePath } from '../../core/models/NodePath';
/**
 * A command used to change the $ref inside an AsyncAPI message headers.
 * @author laurent.broudoux@gmail.com
 * @deprecated Use {@link ChangePropertyCommand} instead.
 * @extends AbstractCommand
 * @class
 */
export declare class ChangeHeadersRefCommand_Aai20 extends AbstractCommand {
    _operationPath: NodePath;
    _headersRef: string;
    _oldHeadersRef: string;
    _changed: boolean;
    constructor(headersRef?: any, operationNode?: any);
    /**
     *
     * @param {Document} document
     */
    execute(document: Document): void;
    /**
     *
     * @param {Document} document
     */
    undo(document: Document): void;
    isValidRef(refCandidate: string): boolean;
}