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     "groupId": "0",
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    },
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     "label": "Green: Band_2",
     "url": "de9a22f87e09adf14f81d5bf75bd298a",
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     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
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    },
    {
     "label": "Blue:  Band_3",
     "url": "ed42871ea3b6100b323361a6503baf23",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAPElEQVQ4jWNhoDJgoaGB//9TZhQjI5qB1AEsowZSDFgoNwIVjBpIOWChghkoYNRAygFSGELKMyoaSB0AAF59AlO8NYpcAAAAAElFTkSuQmCC",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20
    }
   ],
   "legendGroups": [
    {
     "id": "0",
     "heading": "RGB"
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 ]
}