m_configAndPerspectives.setLayout(new BorderLayout());
m_configAndPerspectives.add(m_perspectiveToolBar, BorderLayout.CENTER);
try {
Properties visible = Utils.readProperties(VISIBLE_PERSPECTIVES_PROPERTIES_FILE);
Enumeration keys = (java.util.Enumeration)visible.propertyNames();
if (keys.hasMoreElements()) {
String toolBarIsVisible =
visible.getProperty("weka.gui.beans.KnowledgeFlow.PerspectiveToolBarVisisble");
if (toolBarIsVisible != null && toolBarIsVisible.length() > 0) {