/**
 * Copyright(c) 2014 ABB Switzerland Ltd.
 */
/**
 * For testing purposes, we often need to manipulate what the current
 * time is. This is an interface for a custom time source object
 * so in tests you can use a custom time source.
 */
export interface TimeSource {
    /**
     * Return the current date+time as a javascript Date object
     * @throws nothing
     */
    now(): Date;
}
/**
 * Default time source, returns actual time
 */
export declare class RealTimeSource implements TimeSource {
    /** @inheritdoc */
    now(): Date;
}