Function sixtyfps_corelib::item_tree::visit_items_with_post_visit

pub fn visit_items_with_post_visit<State, PostVisitState>(
    component: &ComponentRc, 
    order: TraversalOrder, 
    visitor: impl FnMut(&ComponentRc, Pin<ItemRef<'_>>, usize, &State) -> (ItemVisitorResult<State>, PostVisitState), 
    post_visitor: impl FnMut(&ComponentRc, Pin<ItemRef<'_>>, PostVisitState, VisitChildrenResult) -> VisitChildrenResult, 
    state: State
) -> VisitChildrenResult

Visit each items recursively

The state parameter returned by the visitor is passed to each children.

Returns the index of the item that cancelled, or -1 if nobody cancelled