ExtensionDescriptor extensionDescriptor = new ExtensionDescriptor();

        XmlNode dom;
        try {
            XMLStreamReader reader = WstxInputFactory.newFactory().createXMLStreamReader(is);
            dom = XmlNodeStaxBuilder.build(reader);
        } catch (XMLStreamException e) {
            throw new IOException(e.getMessage(), e);
        }

        if (!"extension".equals(dom.getName())) {

    Path locateExistingPom(@Nonnull Path project);

    /**
     * Reads the model from the specified byte stream. The stream will be automatically closed before the method
     * returns.
     *
     * @param request The reader request to deserialize the model, must not be {@code null}.
     * @return The deserialized model, never {@code null}.
     * @throws IOException If the model could not be deserialized.

        Xpp3Dom httpHeaders = new Xpp3Dom("httpHeaders");
        Xpp3Dom property = new Xpp3Dom("property");
        Xpp3Dom headerName = new Xpp3Dom("name");
        headerName.setValue("header");
        Xpp3Dom headerValue = new Xpp3Dom("value");
        headerValue.setValue("value");
        property.addChild(headerName);
        property.addChild(headerValue);
        httpHeaders.addChild(property);

import org.eclipse.aether.resolution.VersionResolutionException;
import org.eclipse.aether.resolution.VersionResult;
import org.eclipse.aether.transfer.ArtifactNotFoundException;

/**
 * Default artifact descriptor reader.
 */
@Named
@Singleton
public class DefaultArtifactDescriptorReader implements ArtifactDescriptorReader {
    private final RemoteRepositoryManager remoteRepositoryManager;

        return read(Files.newInputStream(input.toPath()), options);
    }

    public Metadata read(Reader input, Map<String, ?> options) throws IOException {
        Objects.requireNonNull(input, "input cannot be null");

        try (Reader in = input) {
            return new Metadata(new MetadataStaxReader().read(in, isStrict(options)));
        } catch (XMLStreamException e) {

              </models>
              <templates>
                <template>merger.vm</template>
                <template>transformer.vm</template>
                <template>reader-stax.vm</template>
                <template>writer-stax.vm</template>
              </templates>
              <params>
                <param>forcedIOModelVersion=1.2.0</param>

            version = artifact.getVersion();
            localRepo = session.getLocalRepository().getBasePath();
            WorkspaceReader reader = session.getWorkspaceReader();
            workspace = (reader != null) ? reader.getRepository() : null;
            repositories = new ArrayList<>(request.getRepositories().size());
            boolean repoMan = false;

        Path path = request.getPath();
        URL url = request.getURL();
        Reader reader = request.getReader();
        InputStream inputStream = request.getInputStream();
        if (path == null && url == null && reader == null && inputStream == null) {
            throw new IllegalArgumentException("path, url, reader or inputStream must be non null");
        }
        try {

        Set<WorkspaceReader> workspaceReaders = new LinkedHashSet<>();
        // 1) Reactor workspace reader
        WorkspaceReader reactorReader = lookup.lookup(WorkspaceReader.class, ReactorReader.HINT);
        workspaceReaders.add(reactorReader);
        // 2) Repository system session-scoped workspace reader (contains ide and exec request reader)
        for (WorkspaceReader repoWorkspaceReader : chainedWorkspaceReader.getReaders()) {