{
    "feature": "minecraft:dark_forest_moss_patch",
    "placement": [
        {
            "type": "minecraft:count",
            "count": 1
        },
        {
            "type": "minecraft:in_square"
        },
        {
            "type": "minecraft:heightmap",
            "heightmap": "MOTION_BLOCKING_NO_LEAVES"
        },
        {
            "type": "minecraft:biome"
        }
    ]
}