'Display the main admin index page, which lists all of the installed
apps that have been registered in this site.'

@never_cache
def index(self, request, extra_context=None):

    app_list = self.get_app_list(request)
    context = dict(self.each_context(request), title=self.index_title, app_list=app_list)
    context.update((extra_context or {}))
    request.current_app = self.name
    return TemplateResponse(request, (self.index_template or 'admin/index.html'), context)
