CliRequest cliRequest = new CliRequest(new String[] {"--version", "--batch-mode"}, null);
        ByteArrayOutputStream systemOut = new ByteArrayOutputStream();
        PrintStream oldOut = System.out;
        System.setOut(new PrintStream(systemOut));

        // when
        try {
            cli.cli(cliRequest);
        } catch (MavenCli.ExitException exitException) {
            // expected

import com.google.errorprone.annotations.Keep;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.PrintStream;
import java.io.PrintWriter;
import java.io.Reader;
import java.io.Serializable;
import java.io.StringReader;
import java.io.StringWriter;
import java.io.Writer;
import java.lang.reflect.AnnotatedElement;

import com.google.errorprone.annotations.Keep;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.PrintStream;
import java.io.PrintWriter;
import java.io.Reader;
import java.io.Serializable;
import java.io.StringReader;
import java.io.StringWriter;
import java.io.Writer;
import java.lang.reflect.AnnotatedElement;

    ArbitraryInstances.get(PrintStream.class).println("test");
    ArbitraryInstances.get(PrintWriter.class).println("test");
    assertNotNull(ArbitraryInstances.get(File.class));
    assertFreshInstanceReturned(
        ByteArrayOutputStream.class, OutputStream.class,
        Writer.class, StringWriter.class,
        PrintStream.class, PrintWriter.class);

            }
            printWriter.accept(sb.toString());
        }
    }

    @Override
    public void displayHelp(ParserRequest request, Consumer<String> printStream) {
        cliManager.displayHelp(request.command(), printStream);
    }

    protected static class CLIManager {
        public static final String USER_PROPERTY = "D";
        public static final String SHOW_VERSION_AND_EXIT = "v";

 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.maven.cli;

import java.io.PrintStream;
import java.io.PrintWriter;
import java.util.LinkedHashSet;
import java.util.Set;

import org.apache.commons.cli.CommandLine;
import org.apache.commons.cli.DefaultParser;

        prp.store( out, header );
    }

    /**
     * List the properties in the <code>Code</code>.
     */

    public static void list( PrintStream out ) throws IOException {
        prp.list( out );
    }

    /**
     * Add a property.
     */

    public static Object setProperty( String key, String value ) {

            stderr.setLogLevel(LocationAwareLogger.INFO_INT);
            System.setOut(new LoggingOutputStream(s -> stdout.info("[stdout] " + s)).printStream());
            System.setErr(new LoggingOutputStream(s -> stderr.warn("[stderr] " + s)).printStream());
            // no need to set them back, this is already handled by MessageUtils.systemUninstall() above
        }
    }