Craft\AmForms_ExportsService::_getExportColumns PHP Method

    private function _getExportColumns(AmForms_ExportModel $export, AmForms_FormModel $form)
    {
        $columns = array();
        // Ignore Matrix fields in column name setting
        $ignoreMatrixName = craft()->amForms_settings->isSettingValueEnabled('ignoreMatrixFieldAndBlockNames', AmFormsModel::SettingExport);
        // Get fields
        $fields = $this->getExportFields($form);
        // Get column names
        foreach ($export->map['fields'] as $fieldHandle => $columnName) {
            // Should the field be included?
            if ($export->map['included'][$fieldHandle] && isset($fields[$fieldHandle])) {
                // Actual field
                $field = $fields[$fieldHandle];
                if (is_array($field)) {
                    $field = (object) $field;
                    // Fix standard fields
                }
                // Add column based on the field type
                switch ($field->type) {
                    case 'Matrix':
                        $blockTypes = $field->getFieldType()->getSettings()->getBlockTypes();
                        foreach ($blockTypes as $blockType) {
                            $blockTypeFields = $blockType->getFields();
                            foreach ($blockTypeFields as $blockTypeField) {
                                $columns[] = (!$ignoreMatrixName ? $columnName . ':' . $blockType->name . ':' : '') . $blockTypeField->name;
                            }
                        }
                        break;
                    default:
                        $columns[] = $columnName;
                        break;
                }
            }
        }
        return $columns;
    }