syntax_data: {"ast_node_type":"other","tokens":[{"end":69,"kind":"keyword","start":0,"text":"Some(args.as_coroutine().variant_range(*def_id,"}]}
source_snippet:                 Some(args.as_coroutine().variant_range(*def_id, tcx))
context_before:             TyKind::Coroutine(def_id, args) => {
context_after:             }