{"ast_node_type":"variable","tokens":[{"end":81,"kind":"keyword","start":0,"text":"let"}]}
            let stmt_attrs = self.attrs.get(&parameter.hir_id.local_id).copied();
            // original parameter, but with a different pattern id.
            let (new_parameter_pat, new_parameter_id) = self.pat_ident(desugared_span, ident);