import { EventStream } from "./types";
/**
 * Create an event stream
 * The key passed as argument will be used to authorize events with reserved types
 * @param internalSrcKey
 * @returns
 */
export declare function createEventStream(internalSrcKey: any, dataStringifier?: (data: any) => string, onCycleComplete?: () => void): EventStream;
export declare function formatEventData(eventType: string, data?: any, styleDelimiter?: boolean): any;