public function transferChangesToExistingEntity(UserInterface $newEntity, UserInterface $existingEntity)
{
$existingEntity->setUsername($newEntity->getUsername());
$existingEntity->setEmail($newEntity->getEmail());
$existingEntity->setDisplayName($newEntity->getDisplayName());
$existingEntity->setState($newEntity->getState());
$passwordHash = $newEntity->getPassword();
if (!empty($passwordHash)) {
$existingEntity->setPassword($passwordHash);
}
}