{"ast_node_type":"other","tokens":[{"end":66,"kind":"keyword","start":0,"text":"///"}]}
            /// It can be removed once that feature is stabilized.
            /// This method is a hack to workaround unstable of `stmt_expr_attributes`.
            fn visit_method_receiver_expr(&mut self, ex: &$($lt)? $($mut)? Expr) -> Self::Result {