UXOutlineNode

UXOutlineNode is one visible line of a UXOutlineView. The flattening pass emits one for every item whose ancestors are all open. It holds the item itself, its level (depth, for the indent), expandable (whether it gets a disclosure triangle), and expanded (whether it is currently open).

Read nodes through nodeAt(row). The view rebuilds the whole list on every reload, so expansion state is stored against the item on the view, not in the node.