{"ast_node_type":"variable","tokens":[{"end":94,"kind":"keyword","start":0,"text":"if"}]}
        if let ty::Adt(adt, _) = self.tcx.type_of(impl_block_id).instantiate_identity().kind()
        // The impl or impl item is used if the corresponding trait or trait item is used and the ty is used.
            && let Some(adt_def_id) = adt.did().as_local()