syntax_data: {"ast_node_type":"other","tokens":[{"end":89,"kind":"keyword","start":0,"text":"univariant(args.as_coroutine_closure().upvar_tys(),"}]}
source_snippet:             univariant(args.as_coroutine_closure().upvar_tys(), StructKind::AlwaysSized)?
context_before:         ty::CoroutineClosure(_, args) => {
context_after:         }