parent property
The provider holding the record this section hangs off (P9). When it finishes a reload — a record action that changed relation membership is the case that motivated this — the section re-fetches its rows through fetch, so stale membership never survives the action that changed it. Null keeps the load-once-in-initState behaviour: a caller without the provider (a test, a host composing the widget itself) loses the refresh, nothing else.
Implementation
final ResourceViewProvider? parent;