URLConnection urlConnection = url.openConnection();
            urlConnection.setDefaultUseCaches(false);
        } catch (IOException e) {
            throw UncheckedException.throwAsUncheckedException(e);
        }
    }

    static Package[] getPackages(ClassLoader classLoader) {
        return CLASS_LOADER_PACKAGES_FETCHER.getPackages(classLoader);
    }

    @Nullable

import java.net.HttpURLConnection;
import java.net.PasswordAuthentication;
import java.net.SocketTimeoutException;
import java.net.URI;
import java.net.URISyntaxException;
import java.net.URL;
import java.net.URLConnection;
import java.util.HashMap;
import java.util.Map;
import java.util.Properties;

public class Download implements IDownload {
    public static final String UNKNOWN_VERSION = "0";

import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URI;
import java.net.URISyntaxException;
import java.net.URL;
import java.net.URLConnection;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Comparator;
import java.util.EnumSet;
import java.util.Formatter;
import java.util.HashMap;

import java.io.IOException;
import java.io.InputStream;
import java.io.ObjectOutputStream;
import java.io.OutputStream;
import java.net.URI;
import java.net.URISyntaxException;
import java.net.URL;
import java.net.URLConnection;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Comparator;
import java.util.EnumSet;
import java.util.Formatter;
import java.util.HashMap;

    `multipart/mixed; boundary="abc"`.

 *  New: `Authenticator.JAVA_NET_AUTHENTICATOR` forwards authentication requests to
    `java.net.Authenticator`. This obsoletes `JavaNetAuthenticator` in the `okhttp-urlconnection`
    module.

 *  New: `CertificatePinner` now offers an API for inspecting the configured pins.

 *  Upgrade: [Okio 2.6.0][okio_2_6_0].

    ```kotlin
    implementation("com.squareup.okio:okio:2.6.0")