Bug 67890 [PropertiesView] Exception when entries added to properties view
bundles/org.eclipse.ui.views/src/org/eclipse/ui/views/properties/PropertySheetEntry.java
* @since 3.1
	 */
	protected PropertySheetEntry createChildEntry() {
		return new PropertySheetEntry();
	}
    /* (non-Javadoc)
     * Method declared on IPropertySheetEntry.
     */
    public void dispose() {
        if (editor != null) {
            editor.dispose();
            editor = null;
        }
        
        if (childEntries != null)
            for (int i = 0; i < childEntries.length; i++) {
                
                
                
                if (childEntries[i] != null)
                    childEntries[i].dispose();
            }
    }
    /**
     * The child entries of this entry have changed 
     * (children added or removed).
     * Notify all listeners of the change.
     */
    private void fireChildEntriesChanged() {
        if (listeners == null)