code: public function objecttypes()
      {
          if (!$this->objecttypes instanceof ObjecttypesController) {
              $this->objecttypes = new ObjecttypesController($this->getClient(), $this->cachePolicy, $this->cache);
              $this->objecttypes->setLogger($this->logger);
          }
  
          return $this->objecttypes;
      }
docs: Object types define sets of propertySets that can be applied to any Object of the corresponding object type class, such as a Media or a Folder.
  
  @return ObjecttypesController