More symbol names

core/src/main/java/hudson/PluginManager.java

@@ -63,6 +63,7 @@ import org.apache.commons.io.FileUtils;
 import org.apache.commons.io.FilenameUtils;
 import org.apache.commons.io.IOUtils;
 import org.apache.commons.logging.LogFactory;
+import org.jenkinsci.Symbol;
 import org.jenkinsci.bytecode.Transformer;
 import org.jvnet.hudson.reactor.Executable;
 import org.jvnet.hudson.reactor.Reactor;
@@ -1642,7 +1643,7 @@ public abstract class PluginManager extends AbstractModelObject implements OnMas
     /**
      * {@link AdministrativeMonitor} that checks if there are any plugins with cycle dependencies.
      */
-    @Extension
+    @Extension @Symbol("pluginCycleDependencies")
     public static final class PluginCycleDependenciesMonitor extends AdministrativeMonitor {
 
         private transient volatile boolean isActive = false;
@@ -1671,7 +1672,7 @@ public abstract class PluginManager extends AbstractModelObject implements OnMas
      * {@link AdministrativeMonitor} that informs the administrator about a required plugin update.
      * @since 1.491
      */
-    @Extension
+    @Extension @Symbol("pluginUpdate")
     public static final class PluginUpdateMonitor extends AdministrativeMonitor {
 
         private Map<String, PluginUpdateInfo> pluginsToBeUpdated = new HashMap<String, PluginManager.PluginUpdateMonitor.PluginUpdateInfo>();