<description>Maven Toolchain model.</description>

  <dependencies>
    <dependency>
      <groupId>org.apache.maven</groupId>
      <artifactId>maven-support</artifactId>
    </dependency>
    <dependency>
      <groupId>org.apache.maven</groupId>
      <artifactId>maven-api-toolchain</artifactId>
    </dependency>
    <dependency>
      <groupId>org.apache.maven</groupId>
      <artifactId>maven-api-xml</artifactId>

    </dependency>
    <dependency>
      <groupId>org.codehaus.plexus</groupId>
      <artifactId>plexus-xml</artifactId>
    </dependency>

    <dependency>
      <groupId>org.junit.jupiter</groupId>
      <artifactId>junit-jupiter-api</artifactId>
      <scope>test</scope>
    </dependency>
    <dependency>
      <groupId>org.apache.maven.resolver</groupId>
      <artifactId>maven-resolver-api</artifactId>
      <scope>test</scope>

    }

    private Dependency merge(Dependency dep1, Dependency dep2) {
        throw new IllegalArgumentException("Duplicate dependency: " + getDependencyKey(dep1));
    }

    private static String getDependencyKey(org.apache.maven.api.Dependency dependency) {
        return dependency.getGroupId() + ":" + dependency.getArtifactId() + ":"
                + dependency.getType().id() + ":" + dependency.getClassifier();

    }

    public static org.apache.maven.artifact.Artifact toArtifact(Dependency dependency) {
        if (dependency == null) {
            return null;
        }

        org.apache.maven.artifact.Artifact result = toArtifact(dependency.getArtifact());
        result.setScope(dependency.getScope());
        result.setOptional(dependency.isOptional());

        return result;
    }

    <dependency>
      <groupId>org.apache.maven</groupId>
      <artifactId>maven-api-settings</artifactId>
    </dependency>
    <dependency>
      <groupId>org.apache.maven</groupId>
      <artifactId>maven-api-toolchain</artifactId>
    </dependency>
    <dependency>
      <groupId>org.apache.maven</groupId>
      <artifactId>maven-api-plugin</artifactId>
    </dependency>
    <dependency>

        return create(DependencyCoordinatesFactoryRequest.build(session, dependency));
    }

    @Nonnull
    default DependencyCoordinates create(@Nonnull Session session, Dependency dependency) {
        return create(DependencyCoordinatesFactoryRequest.build(
                session,
                dependency.getGroupId(),
                dependency.getArtifactId(),

    <dependency>
      <groupId>org.apache.maven</groupId>
      <artifactId>maven-api-metadata</artifactId>
    </dependency>
    <dependency>
      <groupId>org.apache.maven</groupId>
      <artifactId>maven-api-model</artifactId>
    </dependency>
    <dependency>
      <groupId>org.apache.maven</groupId>
      <artifactId>maven-api-plugin</artifactId>
    </dependency>
    <dependency>

        /**
         * Adds the specified direct dependency.
         *
         * @param dependency the dependency to add, may be {@code null}
         * @return this request for chaining, never {@code null}
         */
        @Nonnull
        public DependencyResolverRequestBuilder dependency(@Nullable DependencyCoordinates dependency) {
            if (dependency != null) {
                if (this.dependencies.isEmpty()) {

            xml.append("    <dependencies>\n");
            for (Dependency dependency : dependencies) {
                xml.append("        <dependency>\n");
                xml.append("            <groupId>").append(dependency.groupId).append("</groupId>\n");
                xml.append("            <artifactId>")
                        .append(dependency.artifactId)
                        .append("</artifactId>\n");

    <dependency>
      <groupId>org.apache.maven</groupId>
      <artifactId>maven-api-metadata</artifactId>
    </dependency>
    <dependency>
      <groupId>org.apache.maven</groupId>
      <artifactId>maven-api-model</artifactId>
    </dependency>
    <dependency>
      <groupId>org.apache.maven</groupId>
      <artifactId>maven-api-toolchain</artifactId>
    </dependency>

    <dependency>