public synchronized void unloadClassloaderForArtifact(String artifactId) {
    artifactIdsToClassLoader.put(artifactId, null);
  }
This implementation of {@link ClasspathService} will be used by {@link ClassPathLoader} when the
system is started in a non-modular fashion. An instance can be retrieved from
{@link DeploymentServiceFactory}
geode-deployment/geode-deployment-legacy/src/main/java/org/apache/geode/classloader/internal/LegacyClasspathServiceImpl.java