'Modifies the panel list for a grouped message.
A panel is a tuple containing two elements:
(\'Panel Label\', \'/uri/to/panel/\')
This must return ``panel_list``.
>>> def panels(self, request, group, action_list, **kwargs):
>>>     panel_list.append((self.get_title(), self.get_url(group)))
>>>     return panel_list'

def panels(self, request, group, panel_list, **kwargs):

    return panel_list
