{"ast_node_type":"other","tokens":[{"end":65,"kind":"keyword","start":0,"text":"|"}]}
        | (ty::ClosureKind::FnOnce, ty::ClosureKind::FnOnce) => {
        | (ty::ClosureKind::FnMut, ty::ClosureKind::FnMut)
            // No adapter needed.