import { SessionDialog } from "../dialogs/session-dialog.js";
import { IncomingReferRequest } from "../messages/methods/refer.js";
import { IncomingRequestDelegate } from "../messages/incoming-request.js";
import { IncomingRequestMessage } from "../messages/incoming-request-message.js";
import { UserAgentCore } from "../user-agent-core/user-agent-core.js";
import { UserAgentServer } from "./user-agent-server.js";
/**
 * REFER UAS.
 * @public
 */
export declare class ReferUserAgentServer extends UserAgentServer implements IncomingReferRequest {
    /**
     * REFER UAS constructor.
     * @param dialogOrCore - Dialog for in dialog REFER, UserAgentCore for out of dialog REFER.
     * @param message - Incoming REFER request message.
     */
    constructor(dialogOrCore: SessionDialog | UserAgentCore, message: IncomingRequestMessage, delegate?: IncomingRequestDelegate);
}