---
features:
  - |
    Add ``group`` property to ``OS::Heat::MultipartMime``. This allow you to
    set group for entire multipart cofig resource like ``group`` property in
    ``OS::Heat::SoftwareConfig``. Aware that, you must make sure all configs
    in MultipartMime works with ``group``. Default value is
    ``Heat::Ungrouped``.
