buildKey static method
Implementation
static String buildKey(String url, Map<String, dynamic>? params) {
if (params == null || params.isEmpty) return url;
final sorted = (params.entries.toList()
..sort((a, b) => a.key.compareTo(b.key)))
.map((e) => '${e.key}=${e.value}')
.join('&');
return '$url?$sorted';
}