{"ast_node_type":"function","tokens":[{"end":98,"kind":"keyword","start":0,"text":"fn"}]}
    fn cat_upvar(&self, hir_id: HirId, var_id: HirId) -> Result<PlaceWithHirId<'tcx>, Cx::Error> {
    /// about these dereferences, so we let it compute them as needed.
        let closure_expr_def_id = self.cx.body_owner_def_id();