CollectStepData collectStepTrace = null;
        ArtifactRequest artifactRequest = null;
        ArtifactDescriptorRequest artifactDescriptorRequest = null;
        Plugin plugin = null;

        while (trace != null) {
            Object data = trace.getData();
            if (data instanceof CollectStepData) {
                collectStepTrace = (CollectStepData) data;

    // from the plugin.xml inside a plugin.
    //
    // TODO This whole method could probably removed by injecting lifeCyclePluginAnalyzer straight into client site.
    // TODO But for some reason the whole plexus appcontext refuses to start when I try this.

    public Set<Plugin> getPluginsBoundByDefaultToAllLifecycles(String packaging) {

                    return true;
                }
            }

            return true;
        } catch (IOException e) {
            LOGGER.warn(
                    "An I/O error occurred while checking if the packaged artifact is up-to-date "
                            + "against the build output directory. "
                            + "Continuing with the assumption that it is up-to-date.",
                    e);

 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.maven.artifact.repository.metadata;

/**
 * Error while deploying repository metadata.
 *
 */
@Deprecated
public class RepositoryMetadataDeploymentException extends Throwable {
    public RepositoryMetadataDeploymentException(String message) {
        super(message);
    }

 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.maven.artifact.metadata;

import org.apache.maven.artifact.Artifact;

/**
 * Error while retrieving repository metadata from the repository - deprecated
 */
@Deprecated
public class ArtifactMetadataRetrievalException
        extends org.apache.maven.repository.legacy.metadata.ArtifactMetadataRetrievalException {

                    {
                        advance();
                    }

                    private void advance() {
                        next = null;
                        while (iterator.hasNext()) {
                            Entry<Object, Object> e = iterator.next();
                            if (PropertiesAsMap.matches(e)) {
                                next = new Entry<String, String>() {

            if (!result.getProblems().isEmpty() && LOGGER.isWarnEnabled()) {
                LOGGER.warn("");
                LOGGER.warn(
                        "Some problems were encountered while building the effective model for '{}'",
                        result.getProject().getId());

                for (ModelProblem problem : result.getProblems()) {

        Set<String> packages = new LinkedHashSet<>();

        try {
            Enumeration<URL> urls = loader.getResources(BUILDER.getExtensionDescriptorLocation());
            while (urls.hasMoreElements()) {

                try (InputStream is = urls.nextElement().openStream()) {
                    ExtensionDescriptor descriptor = BUILDER.build(is);

 *
 * @since 4.0.0
 */
@Experimental
@Immutable
public interface BuilderProblem {

    /**
     * Gets the hint about the source of the problem. While the syntax of this hint is unspecified and depends on the
     * creator of the problem, the general expectation is that the hint provides sufficient information to the user to

          <description>
            Indicates the dependency is optional for use of this library. While the
            version of the dependency will be taken into account for dependency calculation if the
            library is used elsewhere, it will not be passed on transitively. Note: While the type
            of this field is {@code String} for technical reasons, the semantic type is actually