fn walk_item_ctxt<V: MutVisitor, K: WalkItemKind>(
visitor: &mut V,
item: &mut Item<K>,
ctxt: K::Ctxt,
) -> V::Result
fn walk_item_ctxt<V: MutVisitor, K: WalkItemKind>(
visitor: &mut V,
item: &mut Item<K>,
ctxt: K::Ctxt,
) -> V::Result