export declare class GCPubSubMessage<TData = any, TAttrs = any> {
    readonly data: TData;
    readonly attributes: TAttrs;
    readonly orderingKey: string | undefined;
    constructor(data: TData, attributes: TAttrs, orderingKey: string | undefined);
}
type Stringify<T> = {
    [K in keyof T]: T[K] extends string ? T[K] : never;
};
export declare class GCPubSubMessageBuilder<TData, TAttrs extends Stringify<TAttrs> = Record<string, string>> {
    private data?;
    private attributes;
    private orderingKey?;
    private timeout;
    constructor(data?: TData, attributes?: Partial<TAttrs>, orderingKey?: string, timeout?: number);
    setAttributes(attributes: TAttrs): this;
    setData(data: TData): this;
    setOrderingKey(orderingKey: string): this;
    setTimeout(ms: number): this;
    build(): GCPubSubMessage<TData, TAttrs>;
}
export {};