/**
  * Clears the data in the persistence provider
  * @see WURFL_Xml_PersistenceProvider::clear()
  */
 public function remove()
 {
     $this->persistenceStorage->clear();
     $this->wurflManager = null;
 }
 /**
  * Clears the devices from the persistence provider
  * @see WURFL_Xml_PersistenceProvider::clear()
  */
 private function clean()
 {
     $this->persistenceProvider->clear();
 }