java.lang.OutOfMemoryError: Java heap space
   at org.openide.util.lookup.InheritanceTree.collectListeners(InheritanceTree.java:1050)
   at org.openide.util.lookup.InheritanceTree.cleanUpResult(InheritanceTree.java:1016)
   at org.openide.util.lookup.DelegatingStorage.cleanUpResult(DelegatingStorage.java:166)
   at org.openide.util.lookup.AbstractLookup.cleanUpResult(AbstractLookup.java:701)
   at org.openide.util.lookup.AbstractLookup$ReferenceToResult.run(AbstractLookup.java:1378)
   at org.openide.util.lookup.implspi.ActiveQueue$Daemon.run(ActiveQueue.java:139)