import { SfCommand } from '@salesforce/sf-plugins-core';
import { AnyJson } from "@salesforce/ts-types";
export declare class PackageXmlAppend extends SfCommand<any> {
    static readonly description = "Append one or multiple package.xml files into a single one";
    static readonly examples: string[];
    static readonly flags: any;
    protected packageXmlFiles: string[];
    protected outputFile: string;
    run(): Promise<AnyJson>;
}