{"ast_node_type":"other","tokens":[{"end":58,"kind":"keyword","start":0,"text":"BindingMode(ByRef::Yes(user_br_mutbl),"}]}
            BindingMode(ByRef::Yes(user_br_mutbl), _) => {
            BindingMode(ByRef::No, mutbl) => BindingMode(def_br, mutbl),
                if let ByRef::Yes(def_br_mutbl) = def_br {