return new ClassicDependencyManager(transitive, getScopeManager());
    }

    protected DependencySelector getDependencySelector() {
        return new AndDependencySelector(
                ScopeDependencySelector.legacy(
                        null, Arrays.asList(DependencyScope.TEST.id(), DependencyScope.PROVIDED.id())),
                OptionalDependencySelector.fromDirect(),
                new ExclusionDependencySelector());
    }

import org.apache.maven.model.Repository;
import org.apache.maven.model.RepositoryPolicy;
import org.apache.maven.plugin.LegacySupport;
import org.apache.maven.project.artifact.DefaultMetadataSource;
import org.apache.maven.repository.legacy.LegacyRepositorySystem;
import org.codehaus.plexus.PlexusContainer;
import org.codehaus.plexus.component.composition.CycleDetectedInComponentGraphException;
import org.codehaus.plexus.testing.PlexusTest;

            }

            if ("legacy".equals(repository.getLayout())) {
                addViolation(
                        problems,
                        Severity.WARNING,
                        Version.V20,
                        prefix + "layout",
                        repository.getId(),
                        "uses the unsupported value 'legacy', artifact resolution might fail.",