[Dilettante_Pro]

var ob = {
    "className": [
      "fc-past"
    ],
    "start": "2017-01-09T07:00:00+03:00",
    "allDay": false,
    "end": "2017-01-09T08:00:00+03:00",
    "location": "LakeHub, Kisumu, Kisumu County, Kenya",
    "title": "Next '17 Extended",
    "url": "https://developers.google.com/events/5174345854615552/",
    "iconUrl": "https://developers.google.com/_static/images/gdg-icon.png",
    "id": "5174345854615552"
  }
  
  var icalendar = {};
  
  if(ob["url"]){
  	icalendar.URL = ob["url"]
  }
  
  alert(icalendar.URL);