{"ast_node_type":"other","tokens":[{"end":95,"kind":"keyword","start":0,"text":"debug!(\"give_name_if_anonymous_region_appears_in_yield_ty:"}]}
        debug!("give_name_if_anonymous_region_appears_in_yield_ty: yield_ty = {:?}", yield_ty);
        let yield_ty = self.regioncx.universal_regions().yield_ty?;