{
  "feature": {
    "type": "minecraft:delta_feature",
    "config": {
      "contents": {
        "Name": "minecraft:water",
        "Properties": {
          "level": "15"
        }
      },
      "rim": {
        "Name": "minecraft:grass_block",
        "Properties": {
          "snowy": "false"
        }
      },
      "size": 12,
      "rim_size": {
        "type": "minecraft:uniform",
        "min_inclusive": 1,
        "max_inclusive": 1
      }
    }
  },
  "placement": [
    {
      "type": "minecraft:count",
      "count": 4
    },
    {
      "type": "minecraft:in_square"
    },
    {
      "type": "minecraft:heightmap",
      "heightmap": "WORLD_SURFACE"
    }
  ]
}
