canAcceptDrop property

bool Function({int? index, required TKey movingKey, TKey? newParent})? canAcceptDrop

If set, rejected drop targets are filtered out. Receives the dragged key, the candidate new parent, and the final-list index.

Must NOT mutate treeController: drop resolution invokes it mid-resolve, per pointer event, against dragged-key state snapshotted once per resolve.

Implementation

final bool Function({required TKey movingKey, TKey? newParent, int? index})?
canAcceptDrop;