* @return the Container viewer
*/
public NodeViewer openViewer() {
Window viewerWindow = getViewerWindow();
if (viewerWindow.getWindowState() == WindowState.MINIMIZED) {
viewerWindow.restoreSavedWindow();
}
((NodeViewer) viewerWindow.getContents()).setJustOpened(true);
return (NodeViewer) viewerWindow.getContents();
}