while loading from FileMap@3a6543fd{fo=MultiFileObject@6e7d2003[Projects/org-netbeans-modules-maven/jar/Lookup/org-netbeans-modules-maven-nodes-JarIcons.instance]}
Caused: java.lang.ClassCastException: Instance of class org.netbeans.modules.maven.nodes.JarIcons unassignable to interface org.netbeans.modules.maven.spi.nodes.SpecialIcon
   at org.netbeans.modules.projectapi.LazyLookupProviders$1Prov$1.beforeLookup(LazyLookupProviders.java:118)
   at org.openide.util.lookup.ProxyLookup.lookup(ProxyLookup.java:214)
   at org.openide.util.lookup.ProxyLookup.lookup(ProxyLookup.java:222)
   at org.openide.util.lookup.ExcludingLookup.lookup(ExcludingLookup.java:142)
   at org.openide.util.lookup.ProxyLookup.lookup(ProxyLookup.java:222)
   at org.openide.util.lookup.SimpleProxyLookup.lookup(SimpleProxyLookup.java:159)
   at org.netbeans.modules.maven.queries.Info.getIcon(Info.java:207)
   at org.netbeans.modules.projectapi.nb.NbProjectInformationProvider$AnnotateIconProxyProjectInformation.updateIcon(NbProjectInformationProvider.java:183)
   at org.netbeans.modules.projectapi.nb.NbProjectInformationProvider$AnnotateIconProxyProjectInformation.stateChanged(NbProjectInformationProvider.java:179)
   at org.openide.util.WeakListenerImpl$Change.stateChanged(WeakListenerImpl.java:356)
   at org.openide.util.ChangeSupport.fireChange(ChangeSupport.java:133)
   at org.openide.util.ChangeSupport.fireChange(ChangeSupport.java:119)
   at org.netbeans.modules.project.ui.problems.BrokenProjectAnnotator$1.run(BrokenProjectAnnotator.java:93)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1443)
   at org.netbeans.modules.openide.util.GlobalLookup.execute(GlobalLookup.java:68)
   at org.openide.util.lookup.Lookups.executeWith(Lookups.java:303)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2058)