anchor.diff:    }
   
     num percentAvailability(AvailabilityModel location) {
  -    num percentAvailable;
  +    num percentAvailable = 0.0;
   
  -    if(location.estimated != 0) {
  +    if(location.estimated != 0.0) {
         percentAvailable =
             1 - ((location.busyness) / location.estimated).toDouble();
       }
  
positive.code:             fontSize: 20,
            ),
          ),
          subtitle: Row(
            children: <Widget>[
              Text(
  
negative.code:               ),
              ),
              Container(
                width: 12,
                height: 12,
                margin: EdgeInsets.all(5),
                decoration: BoxDecoration(
                  color: model.isOpen ? Colors.green : Colors.red,
                  shape: BoxShape.circle,
  