{"ast_node_type":"other","tokens":[{"end":59,"kind":"keyword","start":0,"text":"hir::CoroutineDesugaring::Gen"}]}
                    hir::CoroutineDesugaring::Gen => "gen",
                    hir::CoroutineDesugaring::Async => "async",
                    hir::CoroutineDesugaring::AsyncGen => "async gen",