@Internal
                public abstract Property<Boolean> getFlag();

                @Internal
                public abstract Property<String> getMessage();

                @Internal
                public abstract Property<Double> getNumber();

                @Internal
                public abstract ListProperty<Integer> getList();

                @Internal

import org.apache.maven.settings.v4.SettingsStaxWriter;

import static org.apache.maven.internal.impl.StaxLocation.getLocation;
import static org.apache.maven.internal.impl.StaxLocation.getMessage;

@Named
@Singleton
public class DefaultSettingsXmlFactory implements SettingsXmlFactory {
    @Override
    public Settings read(@Nonnull XmlReaderRequest request) throws XmlReaderException {

    private final Plugin plugin;

    public PluginResolutionException(Plugin plugin, Throwable cause) {
        super(
                "Plugin " + plugin.getId() + " or one of its dependencies could not be resolved: " + cause.getMessage(),
                cause);
        this.plugin = plugin;
    }

    public PluginResolutionException(Plugin plugin, List<Exception> exceptions, Throwable cause) {
        super(

        final NullArgumentException nullArgumentException = new NullArgumentException("hoge");
        assertThat(nullArgumentException.getArgName(), is("hoge"));
        assertThat(nullArgumentException.getMessage(), is("[ECL0008]argument[hoge] is null."));
    }

    /**
     * @throws Exception
     */
    @Test
    public void testErrorMessage_en() throws Exception {
        // ## Arrange ##

    public String getExceptionClassName() {
        return exceptionClassName;
    }

    @Override
    public String getMessage() {
        if (getMessageException != null) {
            throw UncheckedException.throwAsUncheckedException(getMessageException);
        }
        return super.getMessage();
    }

    @Override
    public String toString() {
        if (toStringRuntimeEx != null) {

        this.message = message;
        this.description = description;
        this.causes = causes;
    }

    @Override
    public String getMessage() {
        return message;
    }

    @Override
    public String getDescription() {
        return description;
    }

    @Override
    public List<? extends Failure> getCauses() {

${fileComment.multilineComment}${packageDecl.statement}
object MessageUtils {
    def getMessage(): String = "Hello      World!"

                }
            }

            message = "The build could not read " + children.size() + " project" + (children.size() == 1 ? "" : "s");
        } else {
            message = getMessage(message, exception);
        }

        return new ExceptionSummary(exception, message, reference, children);
    }

    private ExceptionSummary handle(ProjectBuildingResult result) {

    @Override
    public Exception getException() {
        return exception;
    }

    @Override
    public String getMessage() {
        String msg;

        if (message != null && !message.isEmpty()) {
            msg = message;
        } else {
            msg = exception.getMessage();

            if (msg == null) {
                msg = "";
            }
        }

        return msg;

import org.apache.maven.plugin.descriptor.io.PluginDescriptorStaxWriter;

import static org.apache.maven.internal.impl.StaxLocation.getLocation;
import static org.apache.maven.internal.impl.StaxLocation.getMessage;
import static org.apache.maven.internal.impl.Utils.nonNull;

@Named
@Singleton
public class DefaultPluginXmlFactory implements PluginXmlFactory {
    @Override