static function unserialize($contentNodeDOMNode, $contentObject, $version, $isMain, &$nodeList, &$options, $handlerType = 'ezcontentobject')
 {
     $parentNodeID = -1;
     $remoteID = $contentNodeDOMNode->getAttribute('remote-id');
     $parentNodeRemoteID = $contentNodeDOMNode->getAttribute('parent-node-remote-id');
     $node = eZContentObjectTreeNodeNoLanguage::fetchByRemoteID($remoteID);
     if (is_object($node)) {
         $description = "Node with remote ID {$remoteID} already exists.";
         $choosenAction = eZPackageHandler::errorChoosenAction(eZContentObject::PACKAGE_ERROR_EXISTS, $options, $description, $handlerType, false);
         switch ($choosenAction) {
             // In case user have choosen "Keep existing object and create new"
             case eZContentObject::PACKAGE_NEW:
                 $newRemoteID = eZRemoteIdUtility::generate('node');
                 $node->setAttribute('remote_id', $newRemoteID);
                 $node->store();
                 $nodeInfo = array('contentobject_id' => $node->attribute('contentobject_id'), 'contentobject_version' => $node->attribute('contentobject_version'), 'parent_remote_id' => $remoteID);
                 $nodeAssignment = eZPersistentObject::fetchObject(eZNodeAssignment::definition(), null, $nodeInfo);
                 if (is_object($nodeAssignment)) {
                     $nodeAssignment->setAttribute('parent_remote_id', $newRemoteID);
                     $nodeAssignment->store();
                 }
                 break;
                 // When running non-interactively with ezpm.php
             // When running non-interactively with ezpm.php
             case eZPackage::NON_INTERACTIVE:
             case eZContentObject::PACKAGE_UPDATE:
                 // Update existing node settigns.
                 if (!$parentNodeRemoteID) {
                     // when top node of subtree export, only update node sort field and sort order
                     $node->setAttribute('sort_field', eZContentObjectTreeNodeNoLanguage::sortFieldID($contentNodeDOMNode->getAttribute('sort-field')));
                     $node->setAttribute('sort_order', $contentNodeDOMNode->getAttribute('sort-order'));
                     $node->store();
                     return true;
                 }
                 break;
             default:
                 // This error may occur only if data integrity is broken
                 $options['error'] = array('error_code' => eZContentObject::PACKAGE_ERROR_NODE_EXISTS, 'element_id' => $remoteID, 'description' => $description);
                 return false;
                 break;
         }
     }
     if ($parentNodeRemoteID) {
         $parentNode = eZContentObjectTreeNodeNoLanguage::fetchByRemoteID($parentNodeRemoteID);
         if ($parentNode !== null) {
             $parentNodeID = $parentNode->attribute('node_id');
         }
     } else {
         if (isset($options['top_nodes_map'][$contentNodeDOMNode->getAttribute('node-id')]['new_node_id'])) {
             $parentNodeID = $options['top_nodes_map'][$contentNodeDOMNode->getAttribute('node-id')]['new_node_id'];
         } else {
             if (isset($options['top_nodes_map']['*'])) {
                 $parentNodeID = $options['top_nodes_map']['*'];
             } else {
                 eZDebug::writeError('New parent node not set ' . $contentNodeDOMNode->getAttribute('name'), __METHOD__);
             }
         }
     }
     $isMain = $isMain && $contentNodeDOMNode->getAttribute('is-main-node');
     $nodeInfo = array('contentobject_id' => $contentObject->attribute('id'), 'contentobject_version' => $version, 'is_main' => $isMain, 'parent_node' => $parentNodeID, 'parent_remote_id' => $remoteID, 'sort_field' => eZContentObjectTreeNodeNoLanguage::sortFieldID($contentNodeDOMNode->getAttribute('sort-field')), 'sort_order' => $contentNodeDOMNode->getAttribute('sort-order'));
     if ($parentNodeID == -1 && $parentNodeRemoteID) {
         if (!isset($options['suspended-nodes'])) {
             $options['suspended-nodes'] = array();
         }
         $options['suspended-nodes'][$parentNodeRemoteID] = array('nodeinfo' => $nodeInfo, 'priority' => $contentNodeDOMNode->getAttribute('priority'));
         return true;
     }
     $existNodeAssignment = eZPersistentObject::fetchObject(eZNodeAssignment::definition(), null, $nodeInfo);
     $nodeInfo['priority'] = $contentNodeDOMNode->getAttribute('priority');
     if (!is_object($existNodeAssignment)) {
         $nodeAssignment = eZNodeAssignment::create($nodeInfo);
         $nodeList[] = $nodeInfo;
         $nodeAssignment->store();
     }
     return true;
 }