pub fn navigation_split_view3(
sidebar: &ViewHandle,
content: &ViewHandle,
detail: &ViewHandle,
) -> ViewHandleExpand description
.navigationSplitViewStyle(.automatic)
NavigationSplitView { sidebar } content: { content } detail: { detail }.
The three-column shape — a sidebar, a list, and the selected item — which is
what a Mail or Notes window is. Only the two-column initialiser was bound,
pinning the middle column to EmptyView, so the middle one could not be
filled at all.
All three are () -> some View closures, so each is a function-and-context
pair; the metadata and witnesses follow in generic order behind them.