java.lang.AssertionError: CloneableEditorSupport.getOpenedPanes() must be called from AWT thread only
        at org.openide.text.CloneableEditorSupport.getOpenedPanes(CloneableEditorSupport.java:1059)
        at org.netbeans.modules.xml.wsdl.ui.netbeans.module.WSDLEditorSupport.open(WSDLEditorSupport.java:152)
        at org.netbeans.modules.ide.ergonomics.fod.OpenAdvancedAction$1.run(OpenAdvancedAction.java:96)
        at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:573)
        at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1005)