configureProxyAuthen(); private void configureAuthenticat(); public void download(java.net.URI, java.io.File) throws Exception; private void downloadInternal(java.net.URI, java.io.File) throws Exception; private void addBasicAuthenticati(java.net.URI, java.net.URLConnection) throws java.io.IOException; private String base64Encode(String); private String calculateUserInfo(java.net.URI); private String calculateUserAgent(); } org/apache/maven/wrapper/Downloader.class package org.apache.maven.wrapper; public abstract...

 *  **The Apache HTTP client and HttpURLConnection APIs are deprecated.** They
    continue to work as they always have, but we're moving everything to the new
    OkHttp 3 API. The `okhttp-apache` and `okhttp-urlconnection` modules should
    be only be used to accelerate a transition to OkHttp's request/response API.
    These deprecated modules will be dropped in an upcoming OkHttp 3.x release.