171         let Value::Array(mut variants) = config.remove("variants").unwrap() else {  in to_json_string()
179         for (key, value) in variants[0].as_object().unwrap() {  in to_json_string()
181                 for (package_name, package_config) in value.as_object().unwrap() {  in to_json_string()
182                     for (package_key, package_value) in package_config.as_object().unwrap() {  in to_json_string()
186                                 variant.as_object().unwrap().get("package")  in to_json_string()
201                                 .unwrap()  in to_json_string()
210                     .all(|variant| variant.as_object().unwrap().get(key) == Some(value))  in to_json_string()
220                 variant.as_object_mut().unwrap().remove(key);  in to_json_string()
225             for package_key in package_config.as_object().unwrap().keys() {  in to_json_string()
241                     .retain(|_, package_config| !package_config.as_object().unwrap().is_empty());  in to_json_string()
243                     variant.as_object_mut().unwrap().remove("package");  in to_json_string()
248         if variants.len() > 1 || !variants[0].as_object().unwrap().is_empty() {  in to_json_string()
509         .unwrap();  in variant_config()
647             config.to_json_string().unwrap(),  in factor_variants()
690             config.to_json_string().unwrap(),  in factor_trivial_variant()