Method node_feature_empty

src/graph/in_memory_graph.h:92–94

    return graph_builder_->context_storage()->Empty();
  }
  bool node_feature_empty() const noexcept {
    return graph_builder_->node_feature_storage()->Empty();
  }
  bool neigh_feature_empty() const noexcept {
    return graph_builder_->neigh_feature_storage()->Empty();
  }