allItemKeysOf method
All item keys under sectionKey in render order, INCLUDING
pending-deletion.
Implementation
List<K> allItemKeysOf(K sectionKey) {
_checkNotDisposed();
final children = _tree.getChildren(SectionKey<K>(sectionKey));
if (children.isEmpty) {
return const [];
}
return <K>[
for (final k in children)
if (_assertIsItem(k)) (k as ItemKey<K>).value,
];
}