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     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAUElEQVQ4jWNhoDJgGTWQYsBCuRGoYCQb2HD//398ChsUGRlBdOO9/6H/GRlW4ZJnoZ0LFSE2EAL1SoyrGRgYGIdBpFALsFDNJCgYNZCBYgAAVTYLQlAIUnkAAAAASUVORK5CYII=",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
      "Ephemeral",
      "Intermittent",
      "Near Perennial",
      "Not Applicable",
      "Unknown"
     ]
    }
   ],
   "legendGroups": [
    {
     "id": "0",
     "heading": ""
    }
   ]
  }
 ]
}