Class LaravelUi5\Core\Ui5\Dashboard\DashboardGroupCollector

Collects cross-module dashboard-group contributions declared by service providers before the wire-emitter tree is built.

The LUX composition primitive for dashboards: a composer require'd module can drop one of its Tiles/Cards into another module's Dashboard Group without editing that group — it registers one line in its own service provider (app(DashboardGroupCollector::class)->add($groupNs, $childNs)). Mirrors {@see \LaravelUi5\Core\Ui5\Ui5InfrastructureCollector} (the module collector) one layer up: register-time state, read once by the transformer.

Contributions are artifact namespace strings, resolved through the registry by {@see DefaultDashboardTransformer} exactly like a group's own {@see \LaravelUi5\Core\Ui5\Contracts\Ui5DashboardGroupInterface::getChildNamespaces()} children. So a contributed child is a normally-registered artifact on its own module — its Card manifest endpoint resolves, its Tile emits inline. Artifacts live on modules, by design: the host is not a contribution surface, and this collector never sidesteps module registration — it only routes an already-registered artifact into a foreign group.

Empty collector ⇒ nothing contributed ⇒ the transformer stays a pure 1:1 walk (the Core no-op), so new DefaultDashboardTransformer($registry) is unaffected.