{"ast_node_type":"function","tokens":[{"end":74,"kind":"keyword","start":0,"text":"pub"}]}
    pub fn new(var_hir_id: HirId, closure_def_id: LocalDefId) -> UpvarId {
impl UpvarId {
        UpvarId { var_path: UpvarPath { hir_id: var_hir_id }, closure_expr_id: closure_def_id }