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myEditor.TestMultipageEditor at org.eclipse.ui.internal.WorkbenchPage.setActivePart(WorkbenchPage.java:3441) at org.eclipse.ui.internal.WorkbenchPage.activate(WorkbenchPage.java:610) at org.eclipse.ui.internal.WorkbenchPage.busyShowView(WorkbenchPage.java:1086) at org.eclipse.ui.internal.WorkbenchPage.busyShowView(WorkbenchPage.java:1064) at org.eclipse.ui.internal.WorkbenchPage$19.run(WorkbenchPage.java:3773) at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70) at org.eclipse.ui.internal.WorkbenchPage.showView(WorkbenchPage.java:3770) at org.eclipse.ui.internal.WorkbenchPage.showView(WorkbenchPage.java:3746)