{"ast_node_type":"variable","tokens":[{"end":64,"kind":"keyword","start":0,"text":"let"}]}
    let tag_base_type_di_node = type_di_node(cx, tag_base_type);
) -> SmallVec<&'ll DIType> {
    let mut unions_fields = SmallVec::with_capacity(variant_field_infos.len() + 1);