{"ast_node_type":"variable","tokens":[{"end":46,"kind":"keyword","start":0,"text":"if"}]}
        if let UpvarArgs::Coroutine(..) = args
        // be borrowing from the outer environment, so there's no self-borrows occurring.
            && let hir::CoroutineKind::Desugared(_, hir::CoroutineSource::Closure) =