Конструктор HttpClientBasicCredentials
Реализация
factory HttpClientBasicCredentials(String username, String password) =>
_HttpClientBasicCredentials(username, password);
© 2012 the Dart project authors
Licensed under the BSD 3-Clause "New" or "Revised" License.
https://api.dart.dev/stable/2.18.5/dart-io/HttpClientBasicCredentials/HttpClientBasicCredentials.html
