System.out.println("Project " + project1.getId() + " " + project1);
        Set set = project1.getArtifacts();
        assertNotNull(set, "No artifacts");
        assertTrue(set.size() > 0, "No Artifacts");
        Iterator iter = set.iterator();
        assertTrue(set.size() == 4, "Set size should be 4, is " + set.size());

        while (iter.hasNext()) {
            Artifact artifact = (Artifact) iter.next();

        }

        return selectedProjects;
    }

    public Set<MavenProject> getOptionalProjectsBySelectors(
            MavenExecutionRequest request, List<MavenProject> projects, Set<String> projectSelectors) {
        Set<MavenProject> resolvedOptionalProjects = new LinkedHashSet<>();
        Set<String> unresolvedOptionalSelectors = new HashSet<>();

            if (!set) {
                synchronized (this) {
                    if (!set) {
                        this.set = true;
                        this.model = supplier.get();
                        this.notifyAll();
                    }
                }
            }
            return model;
        }
    }

    DefaultModelTransformerContext(ModelProcessor modelLocator) {

            if (!set) {
                synchronized (this) {
                    if (!set) {
                        this.set = true;
                        this.model = supplier.get();
                        this.notifyAll();
                    }
                }
            }
            return model;
        }
    }

    DefaultTransformerContext(ModelLocator modelLocator) {

     * @throws ArtifactNotFoundException if an artifact is not found
     */
    Set<Artifact> resolve(
            MavenProject project,
            Collection<String> scopesToCollect,
            Collection<String> scopesToResolve,
            MavenSession session,
            Set<Artifact> ignorableArtifacts)
            throws ArtifactResolutionException, ArtifactNotFoundException;

    /**

/**
 * Artifact collector - takes a set of original artifacts and resolves all of the best versions to use
 * along with their metadata. No artifacts are downloaded.
 *
 */
@Deprecated
@SuppressWarnings("checkstyle:parameternumber")
public interface LegacyArtifactCollector {

    ArtifactResolutionResult collect(
            Set<Artifact> artifacts,
            Artifact originatingArtifact,

            // Get local midnight boundary
            Calendar cal = Calendar.getInstance();

            cal.set(Calendar.HOUR_OF_DAY, 0);
            cal.set(Calendar.MINUTE, 0);
            cal.set(Calendar.SECOND, 0);
            cal.set(Calendar.MILLISECOND, 0);

            if (cal.getTime().after(lastModified)) {
                checkForUpdates = true;
            }

import java.util.HashSet;
import java.util.Set;

import org.apache.maven.model.path.UrlNormalizer;
import org.codehaus.plexus.interpolation.InterpolationPostProcessor;

/**
 * Ensures that expressions referring to URLs evaluate to normalized URLs.
 *
 */
class UrlNormalizingPostProcessor implements InterpolationPostProcessor {

    private static final Set<String> URL_EXPRESSIONS;

    static {

 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.maven.internal.impl.resolver;

import java.util.HashSet;
import java.util.List;
import java.util.Set;
import java.util.stream.Collectors;

import org.apache.maven.api.RemoteRepository;
import org.apache.maven.api.Session;
import org.apache.maven.api.model.Repository;

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

import java.util.LinkedHashSet;
import java.util.Set;

import org.apache.maven.artifact.Artifact;
import org.apache.maven.artifact.DefaultArtifact;
import org.apache.maven.lifecycle.internal.SetWithResolutionResult;
import org.junit.jupiter.api.BeforeEach;