{"ast_node_type":"variable","tokens":[{"end":85,"kind":"keyword","start":0,"text":"let"}]}
                        let mut operands = vec![None; variant_fields.fields().len()];
                    VariantId::EnumVariantId(_) | VariantId::StructId(_) => {
                        for RecordLitField { name, expr } in fields.iter() {