export declare const REFERENCE_PROGRESS_TOPIC = "twin-reference-progress";
export interface ReferenceProgressPayload<M extends {
    source: string;
} = {
    source: string;
}> {
    domainId: string;
    twinReferenceProgress: M;
}
export declare function referenceProgressPayload<M extends {
    source: string;
}>(domainId: string, message: M): ReferenceProgressPayload<M>;
/** Passes only this tenant's progress for this source. */
export declare function referenceProgressFilter(domainId: string, source: string): (p: ReferenceProgressPayload | undefined) => boolean;