{
  "format_version": "1.13.0",

  "minecraft:weighted_random_feature": {
    "description": {
      "identifier": "weighted_random_features:weighted_random_feature"
    },

    "features": [
      //The schema says float for weights, but the game truncates it. You should enforce integers.
      ["weighted_random_features:weighted_random_feature_obsidian", 3],
      ["weighted_random_features:weighted_random_feature_planks", 1]
    ]
  }
}