{
    "feature": "minecraft:forest_rock",
    "placement": [
        {
            "type": "minecraft:count",
            "count": {
                "type": "minecraft:uniform",
                "min_inclusive": 0,
                "max_inclusive": 2
            }
        },
        {
            "type": "minecraft:in_square"
        },
        {
            "type": "minecraft:heightmap",
            "heightmap": "MOTION_BLOCKING"
        },
        {
            "type": "minecraft:biome"
        }
    ]
}