* @param type
     * @param requirements
     * @return the selected {@link Toolchain}s
     * @throws ToolchainManagerException if an exception occurs
     */
    @Nonnull
    List<Toolchain> getToolchains(@Nonnull Session session, String type, Map<String, String> requirements);

    /**
     *
     * @param session
     * @param type
     * @return the selected {@link Toolchain}

                select(CommonBuilds.PROJECT_PATH_TEST, CommonBuilds.BUILD_PATH_COMPILE),
                Collections.singletonList(system),
                nonTransitiveDependencyScopes));
        result.add(internalScopeManager.createResolutionScope(
                RS_TEST_RUNTIME,
                InternalScopeManager.Mode.ELIMINATE,

 with its <<<DefaultToolchainManager>>> implementation ({{{./xref/org/apache/maven/toolchain/DefaultToolchainManager.html}source}}),
 to get selected <<<Toolchain>>> ({{{./apidocs/org/apache/maven/toolchain/Toolchain.html}javadoc}}) instance,

 * internal <<<ToolchainManagerPrivate>>> component ({{{./apidocs/org/apache/maven/toolchain/ToolchainManagerPrivate.html}javadoc}})

- plugin execution error due to something that is not expected to go wrong (the compiler executable missing)
- asking to use a plugin for which you do not have a version defined - tools to easily select versions
- goal not found in a plugin (probably could list the ones that are)

 */

// PluginNotFoundException, PluginResolutionException, PluginDescriptorParsingException,
// CycleDetectedInPluginGraphException;

                select(CommonBuilds.PROJECT_PATH_TEST, CommonBuilds.BUILD_PATH_COMPILE),
                Collections.singletonList(system),
                nonTransitiveDependencyScopes));
        result.add(internalScopeManager.createResolutionScope(
                RS_TEST_RUNTIME,
                InternalScopeManager.Mode.ELIMINATE,

        profile.setId(id);
        profile.setActivation(activation);
        return profile;
    }

    @Test
    void testThrowingActivator() {
        DefaultProfileSelector selector = new DefaultProfileSelector();
        selector.addProfileActivator(new ProfileActivator() {
            @Override
            public boolean isActive(Profile profile, ProfileActivationContext context, ModelProblemCollector problems) {

            metadata.setRepository(null);
            selected = localRepository;
        }

        updateSnapshotMetadata(metadata, previousMetadata, selected, localRepository);
    }

    private void updateSnapshotMetadata(
            RepositoryMetadata metadata,
            Map<ArtifactRepository, Metadata> previousMetadata,
            ArtifactRepository selected,
            ArtifactRepository localRepository)

        }

        if (version != null) {
            // if LATEST worked out of the box, remain silent as today, otherwise inform user about search result
            if (searchPerformed) {
                logger.info("Selected plugin {}:{}:{}", request.getGroupId(), request.getArtifactId(), version);
            }
            result.setVersion(version);
            result.setRepository(repo);
        } else {
            logger.warn(

    private static final String CHECK_VERSION_RECOMMENDATION = "check version recommended";

    private static final String CHECK_SELECTED_VERSION_KNOWN = "check selected version known";

    private static final String CHECK_SELECTED_VERSION = "check selected version";

    @Test
    void testRange() throws InvalidVersionSpecificationException, OverConstrainedVersionException {
        Artifact artifact = null;

import org.apache.maven.plugin.PluginValidationManager;
import org.eclipse.aether.RepositorySystemSession;
import org.eclipse.aether.artifact.Artifact;
import org.eclipse.aether.resolution.ArtifactDescriptorResult;

/**
 * Detects Plexus Container Default in plugins.
 *
 * @since 3.9.2
 */
@Singleton
@Named
class PlexusContainerDefaultDependenciesValidator extends AbstractMavenPluginDependenciesValidator {

    @Inject