Pimcore\Model\Object\ClassDefinition\Data\Localizedfields::doGetDataForEditMode PHP Method

    private function doGetDataForEditMode($data, $object, &$fieldData, &$metaData, $level = 1)
    {
        $class = $object->getClass();
        $inheritanceAllowed = $class->getAllowInherit();
        $inherited = false;
        foreach ($data->getItems() as $language => $values) {
            foreach ($this->getFieldDefinitions() as $fd) {
                $key = $fd->getName();
                $fdata = isset($values[$fd->getName()]) ? $values[$fd->getName()] : null;
                if (!isset($fieldData[$language][$key]) || $fd->isEmpty($fieldData[$language][$key])) {
                    // never override existing data
                    $fieldData[$language][$key] = $fdata;
                    if (!$fd->isEmpty($fdata)) {
                        $metaData[$language][$key] = ["inherited" => $level > 1, "objectid" => $object->getId()];
                    }
                }
            }
        }
        if ($inheritanceAllowed) {
            // check if there is a parent with the same type
            $parent = Object\Service::hasInheritableParentObject($object);
            if ($parent) {
                // same type, iterate over all language and all fields and check if there is something missing
                $validLanguages = Tool::getValidLanguages();
                $foundEmptyValue = false;
                foreach ($validLanguages as $language) {
                    $fieldDefinitions = $this->getFieldDefinitions();
                    foreach ($fieldDefinitions as $fd) {
                        $key = $fd->getName();
                        if ($fd->isEmpty($fieldData[$language][$key])) {
                            $foundEmptyValue = true;
                            $inherited = true;
                            $metaData[$language][$key] = ["inherited" => true, "objectid" => $parent->getId()];
                        }
                    }
                }
                if ($foundEmptyValue) {
                    // still some values are passing, ask the parent
                    $parentData = $parent->getLocalizedFields();
                    $parentResult = $this->doGetDataForEditMode($parentData, $parent, $fieldData, $metaData, $level + 1);
                }
            }
        }
        $result = ["data" => $fieldData, "metaData" => $metaData, "inherited" => $inherited];
        return $result;
    }