return this;
        }

        public VersionResolverRequest build() {
            return new DefaultVersionResolverRequest(session, trace, artifactCoordinates, repositories);
        }

        private static class DefaultVersionResolverRequest extends BaseRequest<Session>
                implements VersionResolverRequest {
            private final ArtifactCoordinates artifactCoordinates;

         */
        public VersionRangeResolverRequest build() {
            return new DefaultVersionResolverRequest(session, trace, artifactCoordinates, repositories, nature);
        }

        private static class DefaultVersionResolverRequest extends BaseRequest<Session>
                implements VersionRangeResolverRequest {

#   SourceCacheKey                   - File and RAW model requests (session/hard for consistent file access)
#   DefaultArtifactResolverRequest   - Artifact resolution results (session/hard to avoid re-resolving)
#   DefaultVersionResolverRequest    - Version resolution results (session/soft, less critical than artifacts)
#   RgavCacheKey                     - BOM import caching (session/soft, typically resolved once)