]java.lang.IllegalStateException: Assertion failed. WindowsAPI is required to be called from AWT thread only, see http://www.netbeans.org/download/dev/javadoc/OpenAPIs/org/openide/doc-files/threading.html
	at org.netbeans.core.windows.WindowManagerImpl.assertEventDispatchThreadWeak(WindowManagerImpl.java:914)
	at org.netbeans.core.windows.WindowManagerImpl.topComponentIconChanged(WindowManagerImpl.java:846)
	at org.openide.windows.TopComponent.setIcon(TopComponent.java:558)
	at org.openide.text.EditorSupport$Del$DataNodeListener.propertyChange(EditorSupport.java:745)
	at sun.reflect.GeneratedMethodAccessor32.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:324)
	at org.openide.util.WeakListenerImpl$ProxyListener.invoke(WeakListenerImpl.java:360)
	at $Proxy7.propertyChange(Unknown Source)
	at org.openide.nodes.Node.fireOwnPropertyChange(Node.java:953)
	at org.openide.nodes.Node.fireIconChange(Node.java:823)
	at org.openide.loaders.DataNode.fireChangeAccess(DataNode.java:561)
	at org.openide.loaders.DataNode$PropL.run(DataNode.java:712)
	at org.openide.util.Task.run(Task.java:136)
	at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:330)
	at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:678)