error: missing required attribute 'handler_variant'
       help: Add handler_variant = "Handler" to the macro attributes
 --> tests/ui/missing_handler_variant.rs:6:1
  |
6 | #[dampen_app(ui_dir = "tests/fixtures/multi_view/src/ui", message_type = "Message")]
  | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  |
  = note: this error originates in the attribute macro `dampen_app` (in Nightly builds, run with -Z macro-backtrace for more info)
