'Register the plugin specific urls (add/edit/copy/remove/move)'

def get_urls(self):

    info = ('%s_%s' % (self.model._meta.app_label, self.model._meta.model_name))
    pat = (lambda regex, fn: url(regex, self.admin_site.admin_view(fn), name=('%s_%s' % (info, fn.__name__))))
    url_patterns = [pat('copy-plugins/$', self.copy_plugins), pat('add-plugin/$', self.add_plugin), pat(('edit-plugin/(%s)/$' % SLUG_REGEXP), self.edit_plugin), pat(('delete-plugin/(%s)/$' % SLUG_REGEXP), self.delete_plugin), pat(('clear-placeholder/(%s)/$' % SLUG_REGEXP), self.clear_placeholder), pat('move-plugin/$', self.move_plugin)]
    return (url_patterns + super(PlaceholderAdminMixin, self).get_urls())
