test/test_sparse_image.bpt - platform/system/tools/bpt - Git at Google

 {
   "settings": {
     "disk_size": "128 KiB"
   },
   "partitions": [
     {
       "label": "sparse_data",
       "grow": true
     }
   ]
 }
	{
	"settings": {
	"disk_size": "128 KiB"
	},
	"partitions": [
	{
	"label": "sparse_data",
	"grow": true
	}
	]
	}