public static function generateClassDefinitionJson($class)
{
$data = Webservice\Data\Mapper::map($class, "\\Pimcore\\Model\\Webservice\\Data\\ClassDefinition\\Out", "out");
unset($data->id);
unset($data->name);
unset($data->creationDate);
unset($data->modificationDate);
unset($data->userOwner);
unset($data->userModification);
unset($data->fieldDefinitions);
//add propertyVisibility to export data
$data->propertyVisibility = $class->propertyVisibility;
$json = \Zend_Json::encode($data);
$json = \Zend_Json::prettyPrint($json);
return $json;
}