public ArtifactInstallerRequest build() {
            return new DefaultArtifactInstallerRequest(session, trace, artifacts);
        }

        static class DefaultArtifactInstallerRequest extends BaseRequest<Session> implements ArtifactInstallerRequest {

            private final Collection<ProducedArtifact> artifacts;

            DefaultArtifactInstallerRequest(
                    @Nonnull Session session,