{"ast_node_type":"other","tokens":[{"end":49,"kind":"keyword","start":0,"text":")"}]}
    ) -> Result<Self::InternedVariableKinds, E> {
        data: impl IntoIterator<Item = Result<VariableKind, E>>,
        Ok(Interned::new(InternedWrapper(data.into_iter().collect::<Result<_, _>>()?)))