{"ast_node_type":"other","tokens":[{"end":43,"kind":"keyword","start":0,"text":"debug_assert!(self.data.is_none());"}]}
        debug_assert!(self.data.is_none());
    pub(crate) fn next_virtual_depnode_index(&self) -> DepNodeIndex {
        let index = self.virtual_dep_node_index.fetch_add(1, Ordering::Relaxed);