minecraft-bedrock-json-schemas/test/bp/features/hell_cave_carver_feature.json

{
	"format_version": "1.13.0",
	"minecraft:hell_cave_carver_feature": {
		"description": {
			"identifier": "hell_cave_carver_features:hell_cave_carver_feature"
		},

		"fill_with": "minecraft:planks",
		"width_modifier": 1
	}
}