Sulu\Component\Content\Mapper\ContentMapper::getFieldsData PHP Method

    private function getFieldsData(Row $row, NodeInterface $node, $document, $fields, $templateKey, $webspaceKey, $locale)
    {
        $fieldsData = [];
        foreach ($fields as $field) {
            // determine target for data in result array
            if (isset($field['target'])) {
                if (!isset($fieldsData[$field['target']])) {
                    $fieldsData[$field['target']] = [];
                }
                $target =& $fieldsData[$field['target']];
            } else {
                $target =& $fieldsData;
            }
            // create target
            if (!isset($target[$field['name']])) {
                $target[$field['name']] = '';
            }
            if (($data = $this->getFieldData($field, $row, $node, $document, $templateKey, $webspaceKey, $locale)) !== null) {
                $target[$field['name']] = $data;
            }
        }
        return $fieldsData;
    }