syntax_data: {"ast_node_type":"other","tokens":[{"end":97,"kind":"keyword","start":0,"text":"ty::CoroutineWitness(did,"}]}
source_snippet:             ty::CoroutineWitness(did, args) => ty::CoroutineWitness(did, args.fold_with(folder)),
context_before:             ty::Coroutine(did, args) => ty::Coroutine(did, args.fold_with(folder)),
context_after:             ty::Closure(did, args) => ty::Closure(did, args.fold_with(folder)),