</field>
        <field>
          <name>snapshotVersions</name>
          <version>1.1.0+</version>
          <description>Information for each sub-artifact available in this artifact snapshot. This is only the most recent SNAPSHOT for each unique extension/classifier combination.</description>
          <association>
            <type>SnapshotVersion</type>
            <multiplicity>*</multiplicity>

    }

    private static SnapshotVersion addSnapshotVersion(
            Versioning versioning, String extension, Date timestamp, String version, int buildNumber) {
        Snapshot snapshot = new Snapshot();
        snapshot.setBuildNumber(buildNumber);
        snapshot.setTimestamp(formatDate(timestamp, true));

        SnapshotVersion sv = new SnapshotVersion();
        sv.setExtension(extension);

                            if (version.endsWith("SNAPSHOT")) {
                                final String snapshotVersion = getSnapshotActualVersion(builder, pluginUrl, version);
                                if (StringUtil.isNotBlank(snapshotVersion)) {
                                    final String actualVersion = version.replace("SNAPSHOT", snapshotVersion);
                                    list.add(new Artifact(name, actualVersion,

import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Objects;

import org.apache.maven.artifact.repository.metadata.Snapshot;
import org.apache.maven.artifact.repository.metadata.SnapshotVersion;
import org.apache.maven.artifact.repository.metadata.Versioning;
import org.apache.maven.metadata.v4.MetadataStaxReader;
import org.eclipse.aether.RepositoryCache;
import org.eclipse.aether.RepositoryEvent;