{
  "feature": {
    "feature": {
      "type": "minecraft:simple_block",
      "config": {
        "to_place": {
          "type": "minecraft:simple_state_provider",
          "state": %s
        }
      }
    },
    "placement": [
      {
        "type": "minecraft:block_predicate_filter",
        "predicate": {
          "type": "minecraft:all_of",
          "predicates": [
            {
              "type": "minecraft:matching_blocks",
              "blocks": "minecraft:air"
            }
          ]
        }
      }
    ]
  },
  "tries": %d,
  "xz_spread": %d,
  "y_spread": %d
}
