/**
* Clears the EntityManager. All entities that are currently managed
* by this EntityManager become detached.
*
* @param string|null $entityName if given, only entities of this type will get detached
*
* @return void
*
* @throws ORMInvalidArgumentException if a non-null non-string value is given
* @throws \Doctrine\Common\Persistence\Mapping\MappingException if a $entityName is given, but that entity is not
* found in the mappings
*/
public function clear($entityName = null)
{
if (null !== $entityName && !is_string($entityName)) {
throw ORMInvalidArgumentException::invalidEntityName($entityName);
}
$this->unitOfWork->clear(null === $entityName ? null : $this->metadataFactory->getMetadataFor($entityName)->getName());
}
