indexOfItem method

int indexOfItem(
  1. K itemKey
)

Position of itemKey among its section's children in live-list space (skipping pending-deletion siblings). Returns -1 when itemKey is not present, is itself pending-deletion, or is not an item.

Implementation

int indexOfItem(K itemKey) {
  _checkNotDisposed();
  return _tree.getIndexInParent(ItemKey<K>(itemKey));
}