{
  "format_version": "1.13.0",
  "minecraft:feature_rules": {
    "description": {
      "identifier": "minecraft:savanna_first_double_plant_grass_feature",
      "places_feature": "minecraft:grass_double_plant_patch_feature"
    },
    "conditions": {
      "placement_pass": "first_pass",
      "minecraft:biome_filter": [
        { "test": "has_biome_tag", "value": "savanna" },
        { "test": "has_biome_tag", "operator": "not", "value": "mutated" }
      ]
    },
    "distribution": {
      "iterations": "variable.is_legacy ? 0 : 1",
      "scatter_chance": {
        "numerator": 1,
        "denominator": 5
      },
      "x": {
        "distribution": "uniform",
        "extent": [ 0, 16 ]
      },
      "y": "query.heightmap(variable.worldx, variable.worldz)",
      "z": {
        "distribution": "uniform",
        "extent": [ 0, 16 ]
      }
    }
  }
}