{
    "feature": "terralith:swamp/vanilla/patch_firefly_bush",
    "placement": [
        {
            "type": "minecraft:in_square"
        },
        {
            "type": "minecraft:heightmap",
            "heightmap": "MOTION_BLOCKING"
        },
        {
            "type": "minecraft:biome"
        }
    ]
}