import { RequestMessage } from './message';
export declare class PingExtensionFields {
}
export declare class PongExtensionFields {
}
export declare class Ping extends RequestMessage {
    extensionFields?: PingExtensionFields;
    constructor(init: {
        requestId: Ping['requestId'];
        extensionFields?: Ping['extensionFields'];
    });
}
export declare class Pong extends RequestMessage {
    extensionFields?: PongExtensionFields;
    constructor(init: {
        requestId: Pong['requestId'];
        extensionFields?: Pong['extensionFields'];
    });
}