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     "height": 20,
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     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAk0lEQVQ4je2TwQ2AIBAEl+SKuidtWI1QDZbB0640okaDENdEfRj3CcfcshyCmyU/8PkMNcDBoN0tRQzwfYN4CahH0CoLA6shQR0F1JAOlWCb5n3HOTyDbY1d7rJ2ZcsASy4FN0veAQ7wZI6RAk5Ba0cAp8aUQ8ZlZbilVp9cBsQFajPQYf6oR1kcFL9YTXKl+BvAEWicKXR0+zqUAAAAAElFTkSuQmCC",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
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    }
   ],
   "legendGroups": [
    {
     "id": "0",
     "heading": "PQI"
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}