* <li>mac: macOS (including Darwin)</li>
 * <li>os/2: OS/2 variants</li>
 * <li>netware: Novell NetWare</li>
 * <li>dos: DOS variants</li>
 * <li>tandem: Tandem systems</li>
 * <li>openvms: OpenVMS</li>
 * <li>z/os: z/OS and OS/390</li>
 * <li>os/400: OS/400</li>
 * </ul>
 *
 * @since 4.0.0
 */
@Experimental
public interface OsService extends Service {
    /**

     */
    private static final String FAMILY_UNIX = "unix";

    /**
     * OS family that can be tested for. {@value}
     */
    private static final String FAMILY_OPENVMS = "openvms";

    /**
     * OS family that can be tested for. {@value}
     */
    private static final String FAMILY_ZOS = "z/os";

    /**
     * OS family that can be tested for. {@value}
     */

    the add-opens. Right now that doesn't seem worth the effort, though.
    -->
    <test.add.opens>
      --add-opens java.base/java.lang=ALL-UNNAMED
      --add-opens java.base/java.util=ALL-UNNAMED
      --add-opens java.base/sun.security.jca=ALL-UNNAMED
    </test.add.opens>
    <module.status>integration</module.status>

    the add-opens. Right now that doesn't seem worth the effort, though.
    -->
    <test.add.opens>
      --add-opens java.base/java.lang=ALL-UNNAMED
      --add-opens java.base/java.util=ALL-UNNAMED
      --add-opens java.base/sun.security.jca=ALL-UNNAMED
    </test.add.opens>
    <module.status>integration</module.status>

    /**
     * Opens the file for random access
     *
     * @param mode
     *            access mode (r|rw)
     * @return random access file, needs to be closed when finished
     * @throws CIFSException if an error occurs accessing the resource
     */
    SmbRandomAccess openRandomAccess(String mode) throws CIFSException;

    /**

@SuppressWarnings("module")
module mockwebserver3.junit5 {
  requires okhttp3;
  opens mockwebserver3.junit5.internal;

  requires okhttp3;
  requires okhttp3.logging;
  requires mockwebserver3;
  requires mockwebserver3.junit5;
  requires jdk.crypto.ec;
  requires org.junit.jupiter.api;
  requires okhttp3.modules;
  opens okhttp3.modules.test to org.junit.platform.commons;

 *
 * @since 14.0
 * @author Colin Decker
 */
@J2ktIncompatible
@GwtIncompatible
public abstract class CharSink {

  /** Constructor for use by subclasses. */
  protected CharSink() {}

  /**
   * Opens a new {@link Writer} for writing to this sink. This method returns a new, independent
   * writer each time it is called.
   *
   * <p>The caller is responsible for ensuring that the returned writer is closed.
   *

  private @Nullable Reader current;

  MultiReader(Iterator<? extends CharSource> readers) throws IOException {
    this.it = readers;
    advance();
  }

  /** Closes the current reader and opens the next one, if any. */
  private void advance() throws IOException {
    close();
    if (it.hasNext()) {
      current = it.next().openStream();
    }
  }

  @Override

  public void close() throws IOException {
    if (in != null) {
      try {
        in.close();
      } finally {
        in = null;
      }
    }
  }

  /** Closes the current input stream and opens the next one, if any. */
  private void advance() throws IOException {
    close();
    if (it.hasNext()) {
      in = it.next().openStream();
    }
  }

  @Override