@Override
    MessageBuilder append(char c);

    /**
     * Append content to the message buffer.
     *
     * @param value the content to append
     * @param offset the index of the first {@code char} to append
     * @param len the number of {@code char}s to append
     * @return the current builder
     */
    @Nonnull
    default MessageBuilder a(char[] value, int offset, int len) {

/**
 * FlatRepositoryLayout
 */
@Named("flat")
@Singleton
@Deprecated
public class FlatRepositoryLayout implements ArtifactRepositoryLayout {

    private static final char ARTIFACT_SEPARATOR = '-';

    private static final char GROUP_SEPARATOR = '.';

    public String getId() {
        return "flat";
    }

    public String pathOf(Artifact artifact) {

     */
    @Test
    void testCreateExactMatcher() {
        RequirementMatcher matcher;
        matcher = RequirementMatcherFactory.createExactMatcher("foo");
        assertFalse(matcher.matches("bar"));
        assertFalse(matcher.matches("foobar"));
        assertFalse(matcher.matches("foob"));
        assertTrue(matcher.matches("foo"));
    }

    /**

/**
 */
@Named("default")
@Singleton
public class DefaultRepositoryLayout implements ArtifactRepositoryLayout {
    private static final char PATH_SEPARATOR = '/';

    private static final char GROUP_SEPARATOR = '.';

    private static final char ARTIFACT_SEPARATOR = '-';

    public String getId() {
        return "default";
    }

    public String pathOf(Artifact artifact) {

  <parent>
    <groupId>org.my.group</groupId>
    <artifactId>parent</artifactId>
  </parent>
  <artifactId>child</artifactId>
  <packaging>jar</packaging>

  <properties>
    <prop-child>bar</prop-child>
  </properties>
  <dependencies>
    <dependency>
      <groupId>org.slf4j</groupId>
      <artifactId>slf4j-api</artifactId>
    </dependency>
  </dependencies>

    }

    @Override
    public MessageBuilder append(CharSequence cs, int start, int end) {
        buffer.append(cs, start, end);
        return this;
    }

    @Override
    public MessageBuilder append(char c) {
        buffer.append(c);
        return this;
    }

    @Override
    public MessageBuilder setLength(int length) {
        buffer.setLength(length);
        return this;
    }

    @Override

     *   <li>If this type was created by {@code JavaPathType.patchModule("foo.bar")}, then the method returns
     *       {@code "--patch-module foo.bar=path1:path2"} on Unix or {@code "--patch-module foo.bar=path1;path2"}
     *       on Windows.</li>
     * </ul>
     *
     * @param paths the path to format as a string

        MavenArtifactRepositorySubclass r2 = new MavenArtifactRepositorySubclass("foo");
        MavenArtifactRepositorySubclass r3 = new MavenArtifactRepositorySubclass("bar");

        assertTrue(r1.hashCode() == r2.hashCode());
        assertFalse(r1.hashCode() == r3.hashCode());

        assertTrue(r1.equals(r2));
        assertTrue(r2.equals(r1));

    }

    @Override
    public MessageBuilder append(CharSequence cs, int start, int end) {
        buffer.append(cs, start, end);
        return this;
    }

    @Override
    public MessageBuilder append(char c) {
        buffer.append(c);
        return this;
    }

    @Override
    public MessageBuilder setLength(int length) {
        buffer.setLength(length);
        return this;
    }

    @Override