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     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
      "2,0,2"
     ]
    },
    {
     "label": "Non-Potable",
     "url": "68ccddafb3d40d7d2eae0f6da0467613",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAASklEQVQ4jWNhoDJgGTWQYsAyQg2cr/DegRqGJT4QPMACMoyJkXE/NQycr/DekfpeTnwgeABkMtW8zABlMIysZENNwEJV0xhGpIEA0jwRFlUGvIQAAAAASUVORK5CYII=",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
      "2,1,1"
     ]
    },
    {
     "label": "<all other values>",
     "url": "408cd0f6b9d262fa0146f80a7f794d97",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAARUlEQVQ4jWNhoDJgGTWQYsAyUg08/N+BKqbZMh5gARvGxLCfKgYe/u9IAy/bMh4AmUw9L4MAyNARlmyoCFioaRjDyDQQAInwDRQLLV7sAAAAAElFTkSuQmCC",
     "contentType": "image/png",
     "groupId": "1",
     "height": 20,
     "width": 20
    }
   ],
   "legendGroups": [
    {
     "id": "0",
     "heading": "Water Mains"
    },
    {
     "id": "1",
     "heading": ""
    }
   ]
  }
 ]
}