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     "groupId": "0",
     "height": 20,
     "width": 20,
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    },
    {
     "label": "W-4 corridors",
     "url": "9c709a621fab2cbb40e7e24926bf47e7",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAR0lEQVQ4jWNhoDJgGTWQYsAyQg00MTFxoIZhZ86cOcACNWw/NQw0MTFxpL6Xz5w5cwBkMtW8zABlMIysZENNwEJV0xhGpIEAxb8REk6Tq6AAAAAASUVORK5CYII=",
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     "groupId": "0",
     "height": 20,
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    },
    {
     "label": "W-5 corridors",
     "url": "b8c103625be54cf0bada20e0081bef38",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAOUlEQVQ4jWNhoDJgGTWQYsBCuRGoYMQaWPD/P1VMm8DISCMXTmBkpK6BVAQs1DQMBEYNpBwM/jAEAOATA+MQp1RrAAAAAElFTkSuQmCC",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
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    }
   ],
   "legendGroups": [
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  }
 ]
}