{"ast_node_type":"other","tokens":[{"end":130,"kind":"keyword","start":0,"text":"Closure(&'a"}]}
            Closure(&'a $($mut)? ClosureBinder, &'a $($mut)? Option<CoroutineKind>, &'a $($mut)? P<FnDecl>, &'a $($mut)? P<Expr>),
            /// E.g., `|x, y| body`.
        }