in lib/src/utils.dart [15:22]
String mapToQuery(Map<String, String> map, {Encoding? encoding}) {
var pairs = <List<String>>[];
map.forEach((key, value) => pairs.add([
Uri.encodeQueryComponent(key, encoding: encoding ?? utf8),
Uri.encodeQueryComponent(value, encoding: encoding ?? utf8)
]));
return pairs.map((pair) => '${pair[0]}=${pair[1]}').join('&');
}