{"ast_node_type":"function","tokens":[{"end":87,"kind":"keyword","start":0,"text":"fn"}]}
    fn expand_var_debug_info(&mut self, var_debug_info: &mut Vec<VarDebugInfo<'tcx>>) {
    #[instrument(level = "trace", skip(self))]
        var_debug_info.flat_map_in_place(|mut var_debug_info| {