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     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAT0lEQVQ4jWMpLCrczsTE5MBABfDv378DLCDDCtqbOahh4ITKWgcWBioDllEDKQYslBuBCkYNpBywUMEMFDBq4IgIw3///h0AlbTUMAxkFgCiPxMkUaeySgAAAABJRU5ErkJggg==",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
      0.2
     ]
    },
    {
     "label": "Moderate negative (-0.5 to -0.2)",
     "url": "e8dde26f8e430549d7db775c889d747c",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAT0lEQVQ4jWPJLyzczsTI6MBABfDv//8DLCDDjAK9OKhh4Ln12xxYGKgMWEYNpBiwUG4EKhg1kHLAQgUzUMCogSMiDP/9/38AVNJSwzCQWQCFZBPQZsBDtwAAAABJRU5ErkJggg==",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
      0.5
     ]
    },
    {
     "label": "Strong negative (-1.0 to -0.5)",
     "url": "1f19dea913ad4190a9c398b22162bfcd",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAASElEQVQ4jWPJy8/fzsDA4MBAHXCABWTYf3kxDmqYxvjwlQPIQKoCllEDKQYslBuBCkYNpBywUMEMFDBq4EgJwwOgkpZK5h0AAEKdCmi/EDvBAAAAAElFTkSuQmCC",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
      0.815923207227555
     ]
    }
   ],
   "legendGroups": [
    {
     "id": "0",
     "heading": "Correlation"
    }
   ]
  }
 ]
}