return project == null ? null : project.getModel().getDelegate();
    }

    //
    // Implementation
    //

    private File findArtifact(MavenProject project, Artifact artifact) {
        // POMs are always returned from the file system
        if ("pom".equals(artifact.getExtension())) {
            return project.getFile();
        }

        // First check in the project local repository

            {@code xml:space="preserve"} to elements you want to preserve whitespace.</p>
            <p>You can control how child POMs inherit configuration from parent POMs by adding {@code combine.children}
            or {@code combine.self} attributes to the children of the configuration element:</p>
            <ul>

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

    /**
     * Denotes minimal validation of POMs. This validation level is meant for processing of POMs from repositories
     * during metadata retrieval.
     */
    int VALIDATION_LEVEL_MINIMAL = 0;

    /**

    /**
     * User property for selecting dependency manager behaviour regarding transitive dependencies and dependency
     * management entries in their POMs. Maven 3 targeted full backward compatibility with Maven2, hence it ignored
     * dependency management entries in transitive dependency POMs. Maven 4 enables "transitivity" by default, hence
     * unlike Maven2, obeys dependency management entries deep in dependency graph as well.
     * <p>

        return projectFile("maven", name);
    }

    protected File projectFile(String groupId, String artifactId) {
        return new File(getLocalRepositoryPath(), "/" + groupId + "/poms/" + artifactId + "-1.0.pom");
    }

    // ----------------------------------------------------------------------
    // The local repository for this category of tests

import org.apache.maven.api.services.ModelSource;
import org.apache.maven.api.services.VersionRangeResolverException;

/**
 * A model resolver to assist building of dependency POMs.
 *
 * @see DefaultArtifactDescriptorReader
 */
@Named
@Singleton
public class DefaultModelResolver implements ModelResolver {

    @Override
    public ModelSource resolveModel(