import { JSONValue } from "./traits";
import { Browser } from "../transport/browser";
import { Store } from "../store/store";
export type ExternalIds = object & {
    [k: string]: JSONValue;
};
export interface ExternalIdsSessionCache {
    getExternalIds(): ExternalIds;
}
export declare class ExternalIdsSessionCacheImpl implements ExternalIdsSessionCache {
    private browser;
    private sessionStorage;
    constructor(browser: Browser, sessionStorage: Store);
    getExternalIds(): ExternalIds;
    private initIds;
}