anchor.diff:      // Create an array of styles.
       var map_styles = [
         {
  -        "featureType": "administrative.locality",
  -        "stylers": [
  -          { "visibility": "off" }
  -        ]
  -      },{
           "featureType": "administrative",
           "elementType": "labels.text.fill",
           "stylers": [
  -          { "saturation": -100 },
  -          { "lightness": 20 }
  +          { "saturation": -100 }
  +        ]
  +      },{
  +        "featureType": "administrative.locality",
  +        "stylers": [
  +          { "visibility": "off" }
           ]
         },{
           "featureType": "administrative.land_parcel",
  
positive.code:           { "lightness": 41 }
          ]
        },{
          "featureType": "transit.station.airport",
          "stylers": [
            { "lightness": 49 }
          ]
        },{
          "featureType": "road",
          "stylers": [
            { "saturation": -25 },
  
negative.code:         "elementType": "geometry.stroke",
          "stylers": [
            { "visibility": "off" }
          ],
          "elementType": "geometry.fill",
          "stylers": [
            { "visibility": "on" },
            { "lightness": -5 }
          ]
        },{
          "featureType": "transit.line",
          "stylers": [
            { "visibility": "off" }
          ]
        },{
          "featureType": "transit.station.airport",
          "stylers": [
            { "lightness": 49 }
          ]
        },{
          "featureType": "transit.station.rail",
  