<exclude>org.apache.maven.toolchain.DefaultToolchainManager#logger</exclude>
              <!-- Remove plexus utils -->
              <exclude>org.apache.maven.project.ProjectSorter#getDAG():METHOD_REMOVED</exclude>
              <!-- classes moved to maven-compat -->
              <exclude>org.apache.maven.plugin.PluginManager</exclude>

 * their lifecycle is shared as well: once supplied repository system is shut-down, this instance becomes closed as
 * well. Any subsequent {@code getXXX} method invocation attempt will fail with {@link IllegalStateException}.
 */
public class RepositorySystemSupplier implements Supplier<RepositorySystem> {
    private final AtomicBoolean closed = new AtomicBoolean(false);