Bug 67890 [PropertiesView] Exception when entries added to properties view
bundles/org.eclipse.ui.views/src/org/eclipse/ui/views/properties/PropertySheetEntry.java
/**
     * The values we are displaying/editing.
     * These objects repesent the value of one of the
     * properties of the values of our parent entry.
     * Except for the root entry where they represent the
     * input (selected) objects.
     */
    private Object[] values = new Object[0];
    /**
     * The property sources for the values we are displaying/editing.
     */
    private Map sources = new HashMap(0);
    /**
     * The value of this entry is defined as the the first object
     * in its value array or, if that object is an 
     * <code>IPropertySource</code>, the value it returns when sent
     * <code>getEditableValue</code>
     */
    private Object editValue;
    private PropertySheetEntry parent;
    private IPropertySourceProvider propertySourceProvider;
    private IPropertyDescriptor descriptor;
    private CellEditor editor;
    private String errorText;
    private PropertySheetEntry[] childEntries = null;