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     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAgElEQVQ4je2T0Q2AIAxEr4mDwUbdgI7ARnSz+gEffkgFNTEa74sc9OXSCwtu1vID3wpkk3ZSZNLzQLYAoGycBDYAiD3wUcLi+DQHrOn6YhNkknEg4AM7utKyzgEzCdiScz8JrIrYLyb2BnxgTUGtoNA88UbGdljBOvL0K3/5SeAKVQQdYR/CPncAAAAASUVORK5CYII=",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
      "Regional Bulk"
     ]
    },
    {
     "label": "<all other values>",
     "url": "8ce84bb508d80db91366b8804384e77e",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAfklEQVQ4je3Qyw3EIAwE0DmkEOgkrsykMtPJTCl7IdFKq0A+e2QkhEDWw3jBn7NMcIJHSttrW6/AYmYOAJKc5Pb1wG1wzTm7mR0XEeERgTN0CKaUBiX3wJ9IAjpzHIElIiDJ907bDB+DAFBIVpLrfu4VX/1y7XX1BLycCb7PBxkMKQJT2uqxAAAAAElFTkSuQmCC",
     "contentType": "image/png",
     "groupId": "1",
     "height": 20,
     "width": 20
    }
   ],
   "legendGroups": [
    {
     "id": "0",
     "heading": "Res Class"
    },
    {
     "id": "1",
     "heading": ""
    }
   ]
  }
 ]
}