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     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
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     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
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    },
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     "label": "No data",
     "url": "7323af331baf063b162b6350adf1a2b3",
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   ],
   "legendGroups": [
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     "heading": "mean_velocity"
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}