{"ast_node_type":"other","tokens":[{"end":94,"kind":"keyword","start":0,"text":"//"}]}
            // vectors behind references (&Vec<T>) are already supported. Users can not pass a
            // FIXME(ZuseZ4): We should add support for Vec here too, but it's less urgent since
            // Vec by value for reverse mode, so this would only help forward mode autodiff.