Interface PositionResolverResult

Marks an outer / whole-layout-edge cell. The built-in drop overlay only reads position; consumers that route edge cells differently can read this.

Display hint: this cell docks as a dedicated edge group (not a grid-edge split). Purely advisory. A co-installed resolver's UI (e.g. the DnD compass) can suppress its own overlay for these cells so they don't double-render with the edge-group affordance.