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08/01 WARNING [org.openide.loaders.InstanceDataObject]: Instance file MultiFileObject@22ee8c[Projects/org-netbeans-modules-java-j2seproject/Lookup/org-netbeans-modules-groovy-support-GroovyLookupProvider.instance] uses instanceCreate attribute, but doesn't define instanceClass attribute. Please add instanceClass attr to avoid multiple instances creation,see details at http://www.netbeans.org/issues/show_bug.cgi?id=131951
reassigning all the issues to dsimonek who will take care about them. These are more TASKs then real bugs.
Issue 131951 fixed - warning should not appear.