getNodeTypes() public method

This is only a proxy to the transport
public getNodeTypes ( array $nodeTypes = [] ) : array | DOMDocument
$nodeTypes array Empty for all or specify node types by name
return array | DOMDocument containing the nodetype information
 /**
  * Fetch a node type from backend.
  *
  * Without a filter parameter, this will fetch all node types from the backend.
  *
  * It is no problem to call this method with null as name, it will remember
  * once it fetched all node types and do nothing after that.
  *
  * On fetch all, already cached node types are kept.
  *
  * @param string $name type name to fetch. defaults to null which will
  *      fetch all nodes.
  */
 protected function fetchNodeTypes($name = null)
 {
     if ($this->fetchedAllFromBackend) {
         return;
     }
     if (null !== $name) {
         if (!empty($this->primaryTypes[$name]) || !empty($this->mixinTypes[$name])) {
             return;
             //we already know this node
         }
         //OPTIMIZE: also avoid trying to fetch nonexisting definitions we already tried to get
         $nodetypes = $this->objectManager->getNodeType($name);
     } else {
         $nodetypes = $this->objectManager->getNodeTypes();
         $this->fetchedAllFromBackend = true;
     }
     foreach ($nodetypes as $nodetype) {
         $nodetype = $this->factory->get('NodeType\\NodeType', array($this, $nodetype));
         $name = $nodetype->getName();
         //do not overwrite existing types. maybe they where changed locally
         if (empty($this->primaryTypes[$name]) && empty($this->mixinTypes[$name])) {
             $this->addNodeType($nodetype);
         }
     }
 }