void testArtifact(Artifact node);

    void startProcessChildren(Artifact artifact);

    void endProcessChildren(Artifact artifact);

    void includeArtifact(Artifact artifact);

    void omitForNearer(Artifact omitted, Artifact kept);

    void updateScope(Artifact artifact, String scope);

    @Deprecated
    void manageArtifact(Artifact artifact, Artifact replacement);

- malformed POM
- local repository not writable
- remote repositories not available
- artifact metadata missing
- extension metadata missing
- extension artifact missing
- artifact metadata retrieval problem
- version range violation
- circular dependency
- artifact missing
- artifact retrieval exception
- md5 checksum doesn't match for local artifact, need to redownload this
- POM doesn't exist for a goal that requires one

import java.util.List;

import org.apache.maven.artifact.Artifact;
import org.apache.maven.artifact.deployer.ArtifactDeploymentException;
import org.apache.maven.artifact.installer.ArtifactInstallationException;
import org.apache.maven.artifact.repository.ArtifactRepository;
import org.apache.maven.artifact.repository.RepositoryRequest;
import org.apache.maven.artifact.resolver.ArtifactNotFoundException;

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

import java.util.List;

import org.apache.maven.artifact.Artifact;
import org.junit.jupiter.api.Test;

import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertFalse;

 * under the License.
 */
package org.apache.maven.artifact.versioning;

import java.util.ArrayList;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Objects;
import java.util.WeakHashMap;

import org.apache.maven.artifact.Artifact;
import org.apache.maven.artifact.DefaultArtifact;

/**
 * Construct a version range from a specification.

    private final Artifact artifact;

    VersionsMetadata(Artifact artifact, Date timestamp) {
        super(createRepositoryMetadata(artifact), (Path) null, timestamp);
        this.artifact = artifact;
    }

    VersionsMetadata(Artifact artifact, Path path, Date timestamp) {
        super(createRepositoryMetadata(artifact), path, timestamp);
        this.artifact = artifact;
    }

        this.logger = logger;
    }

    public void testArtifact(Artifact node) {}

    public void startProcessChildren(Artifact artifact) {}

    public void endProcessChildren(Artifact artifact) {}

    public void includeArtifact(Artifact artifact) {}

    public void omitForNearer(Artifact omitted, Artifact kept) {}

    public void omitForCycle(Artifact omitted) {}

import java.util.List;

import org.apache.maven.artifact.Artifact;
import org.apache.maven.artifact.repository.ArtifactRepository;
import org.apache.maven.artifact.repository.DefaultRepositoryRequest;
import org.apache.maven.artifact.repository.RepositoryRequest;
import org.apache.maven.artifact.repository.metadata.ArtifactRepositoryMetadata;
import org.apache.maven.artifact.repository.metadata.Metadata;

        return (groupId != null) ? groupId : "";
    }

    /**
     * Gets the effective artifact identifier of the model.
     *
     * @return The effective artifact identifier of the model or an empty string if unknown, never {@code null}.
     */
    public String getArtifactId() {
        return (artifactId != null) ? artifactId : "";
    }

    /**
     * Gets the effective version of the model.
     *

 * <li>Check Local Repository: Maven first checks if the artifact is available in the local repository.</li>
 * <li>Check Remote Repositories: If the artifact is not found locally, Maven queries the configured remote repositories in the order they are listed.</li>
 * <li>Download and Cache: If Maven finds the artifact in a remote repository, it downloads it and stores it in the local repository for future use.</li>
 * </ol>