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

{
  "format_version": "1.13.0",

  "minecraft:single_block_feature": {
    "description": {
      "identifier": "rect_layout_features:rect_layout_feature_obsidian"
    },

    "places_block": "minecraft:obsidian",

    "enforce_placement_rules": false,
    "enforce_survivability_rules": false
  }
}