import { IRequestOptions } from "@esri/arcgis-rest-request";
/**
 * Helper that returns the appropriate portal url for a given request. `requestOptions.portal` is given
 * precedence over `authentication.portal`. If neither `portal` nor `authentication` is present,
 * `www.arcgis.com/sharing/rest` is returned.
 *
 * @param requestOptions - Request options that may have authentication manager
 * @returns Portal url to be used in API requests
 */
export declare function getPortalUrl(requestOptions?: IRequestOptions): string;