{"ast_node_type":"other","tokens":[{"end":58,"kind":"keyword","start":0,"text":"if"}]}
        if self.is_async_drop_in_place_coroutine(def_id) {
    ) -> Result<&'tcx CoroutineLayout<'tcx>, &'tcx LayoutError<'tcx>> {
            // layout of `async_drop_in_place<T>::{closure}` in case,