syntax_data: {"ast_node_type":"other","tokens":[{"end":83,"kind":"keyword","start":0,"text":"ty::CoroutineClosure(_,"}]}
source_snippet:             ty::CoroutineClosure(_, args) => ty::UpvarArgs::CoroutineClosure(args),
context_before:             ty::Coroutine(_, args) => ty::UpvarArgs::Coroutine(args),
context_after:             _ => return,