/**
 * Information about an AudioItem.
 *
 * Directly ties off to the JSON payload from Alexa.
 */ export class AudioItem { public stream : AudioItemStream ; public constructor ( private _json ) { this . stream = new AudioItemStream ( ) ; this . stream . url = _json . stream . url ; this . stream . token = _json . stream . token ; this . stream . expectedPreviousToken = _json . stream . expectedPreviousToken ; this . stream . offsetInMilliseconds = _json . stream . offsetInMilliseconds ; } /**
     * Clone function to prevent changes being made to internal state
     */ public clone ( ) { return new AudioItem ( this ) ; } } export class AudioItemStream { public url : string = null ; public token : string = null ; public expectedPreviousToken : string = null ; public offsetInMilliseconds : number ; }