{
  "format_version": "1.13.0",
  "minecraft:scatter_feature": {
    "description": {
      "identifier": "minecraft:optional_shelf_mushroom_feature"
    },
    "iterations": 1,
    "scatter_chance":{
        "numerator": 1,
        "denominator": 4
    },
    "x": 0,
    "y": 0,
    "z": 0,
    "places_feature": "minecraft:shelf_mushroom_feature"
  }
}