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    },
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    },
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    },
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    },
    {
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     "groupId": "3",
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     "values": [
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    }
   ],
   "legendGroups": [
    {
     "id": "0",
     "heading": "Cenozoic"
    },
    {
     "id": "1",
     "heading": "Mesozoic"
    },
    {
     "id": "2",
     "heading": "Paleozoic"
    },
    {
     "id": "3",
     "heading": "Precambrian"
    }
   ]
  }
 ]
}