@property<EOL><INDENT>def tab_classes(self):<DEDENT>
classes = super(MainNavigationBaseTab, self).tab_classes[:]<EOL>if self.current_tab.request.user.is_authenticated():<EOL><INDENT>classes += ['<STR_LIT>']<EOL><DEDENT>return classes<EOL>
If user is logged in, set ``logged_in_only`` class.