public function _installRelated(& $transport, & $parent, $element, $options, $owner = '') {
        $installed = true;
        if ($parent instanceof xPDOObject && isset ($element[xPDOTransport::RELATED_OBJECTS]) && is_array($element[xPDOTransport::RELATED_OBJECTS])) {
            foreach ($element[xPDOTransport::RELATED_OBJECTS] as $rAlias => $rVehicles) {
                $rMeta = $parent->getFKDefinition($rAlias);
                if ($rMeta) {
                    if (!empty($owner) && $owner !== $rMeta['owner']) continue;
                    $rOptions = $options;
                    if (isset($element[xPDOTransport::RELATED_OBJECT_ATTRIBUTES])) {
                        if (isset($element[xPDOTransport::RELATED_OBJECT_ATTRIBUTES][$rAlias])) {
                            $rOptions = array_merge($rOptions, $element[xPDOTransport::RELATED_OBJECT_ATTRIBUTES][$rAlias]);
                        } elseif (isset($element[xPDOTransport::RELATED_OBJECT_ATTRIBUTES][$rMeta['class']])) {
                            $rOptions = array_merge($rOptions, $element[xPDOTransport::RELATED_OBJECT_ATTRIBUTES][$rMeta['class']]);
                        }
                    }
                    foreach ($rVehicles as $rKey => $rVehicle) {
                        $installed = $this->_installObject($transport, $rOptions, $rVehicle, $parent, $rMeta);
                    }
                }
            }
        }
        return $installed;
    }