assertNotNull(
        rootLocaleFormat("%s must be annotated with @TesterAnnotation.", annotationClass),
        annotationClass.getAnnotation(TesterAnnotation.class));
    final Retention retentionPolicy = annotationClass.getAnnotation(Retention.class);
    assertNotNull(
        rootLocaleFormat("%s must have a @Retention annotation.", annotationClass),
        retentionPolicy);
    assertEquals(

     *
     * @param project         The project whose dependencies should be resolved, must not be {@code null}.
     * @param scopesToResolve The dependency scopes that should be resolved, may be {@code null}.
     * @param session         The current build session, must not be {@code null}.
     * @return The transitive dependencies of the specified project that match the requested scopes, never {@code null}.

     * @param model The model to validate, must not be {@code null}.
     * @param request The model building request that holds further settings, must not be {@code null}.
     * @param problems The container used to collect problems that were encountered, must not be {@code null}.
     * @since 4.0.0
     */

     * created automatically.
     *
     * @param output The file to serialize the model to, must not be {@code null}.
     * @param options The options to use for serialization, may be {@code null} to use the default values.
     * @param model The model to serialize, must not be {@code null}.
     * @throws IOException If the model could not be serialized.
     */

        assertContains(problems.messages.get(0), "'mirrors.mirror.id' must not be 'local'");
        assertContains(problems.messages.get(1), "'mirrors.mirror.url' for local is missing");
        assertContains(problems.messages.get(2), "'mirrors.mirror.mirrorOf' for local is missing");
        assertContains(problems.messages.get(3), "'mirrors.mirror.id' must not contain any of these characters");
    }

    @Test

     * does not actually resolve the artifact files.
     *
     * @param session the {@link Session}, must not be {@code null}
     * @param root the Maven Dependency, must not be {@code null}
     * @param scope the {link PathScope} to collect dependencies, must not be {@code null}
     * @return the collection result, never {@code null}

     *
     * @param session the {@link Session}, must not be {@code null}
     * @param installationToolchainsFile The {@link Source} pointing to the installation toolchains, must not be {@code null}
     * @param userToolchainsSource The {@link Source} pointing to the user toolchains, must not be {@code null}
     * @throws ToolchainsBuilderException if the project cannot be created

        assertContains(result.getErrors().get(1), "'pluginRepositories.pluginRepository.id' must not be 'local'");
        assertContains(result.getErrors().get(2), "'distributionManagement.repository.id' must not be 'local'");
        assertContains(result.getErrors().get(3), "'distributionManagement.snapshotRepository.id' must not be 'local'");
    }

    @Test

     *
     * @param model The model whose duplicate elements should be merged, must not be {@code null}.
     * @param request The model building request that holds further settings, must not be {@code null}.
     * @param problems The container used to collect problems that were encountered, must not be {@code null}.
     */

    }

    /**
     * Validate the specified settings.
     *
     * @param settings The settings to validate, must not be {@code null}.
     * @return The list of problems that were encountered, must not be {@code null}.
     */
    @Nonnull
    default List<BuilderProblem> validate(@Nonnull Settings settings) {
        return validate(settings, false);
    }