syntax_data: {"ast_node_type":"other","tokens":[{"end":72,"kind":"keyword","start":0,"text":"args.as_coroutine().tupled_upvars_ty().visit_with(self);"}]}
source_snippet:                 args.as_coroutine().tupled_upvars_ty().visit_with(self);
context_before:             ty::Coroutine(_, args) => {