@Test
    void testSetLocalRepository() {
        Settings s = Settings.newInstance();

        s = s.withLocalRepository("xxx");
        assertEquals("xxx", s.getLocalRepository());

        s = s.withLocalRepository("yyy");
        assertEquals("yyy", s.getLocalRepository());

        s = s.withLocalRepository(null);
        assertNull(s.getLocalRepository());
    }

import org.apache.maven.api.annotations.Experimental;
import org.apache.maven.api.annotations.Nonnull;

/**
 * Installs {@link ProducedArtifact}s to the local repository.
 *
 * @since 4.0.0
 * @see Session#withLocalRepository(org.apache.maven.api.LocalRepository)
 */
@Experimental
public interface ArtifactInstaller extends Service {
    /**
     * @param request {@link ArtifactInstallerRequest}

     *
     * @param localRepository the new local repository
     * @return the derived session
     * @throws NullPointerException if {@code localRepository} is null
     */
    @Nonnull
    Session withLocalRepository(@Nonnull LocalRepository localRepository);

    /**
     * Creates a derived session using the given remote repositories.
     *
     * @param repositories the new list of remote repositories