Craft\AmForms_ExportsService::saveTotalByCriteria PHP Method

    public function saveTotalByCriteria(AmForms_ExportModel $export)
    {
        // Set submissions criteria
        $params = array('limit' => null, 'formId' => $export->formId);
        $criteria = craft()->amForms_submissions->getCriteria($params);
        // Add export criteria
        $this->_addExportCriteria($export, $criteria);
        // Get total!
        $export->totalCriteria = $criteria->total();
        // Save export!
        $this->saveExport($export);
    }