<value><string>python: \'%s_%s_selection\' % (request.get("proxy_form_id") or context.portal_selections.getSelectionParamsFor(\'%s_list_mode_proxy_selection\' % context.REQUEST.get(\'selection_name\', \'\')).get(\'proxy_form_id\') or form.getId(), request.get("proxy_field_id") or context.portal_selections.getSelectionParamsFor(\'%s_list_mode_proxy_selection\' % context.REQUEST.get(\'selection_name\', \'\')).get(\'proxy_field_id\') or field.getId())</string></value>