lib/Doctrine/ODM/CouchDB/DocumentManager.php
public function clear($objectName = null)
    {
        if ($objectName === null) {
            // Todo: Do a real delegated clear?
            $this->unitOfWork = new UnitOfWork($this);
        } else {
            //TODO
            throw new CouchDBException("DocumentManager#clear(\$objectName) not yet implemented.");
        }
    }
public function clear($objectName = null)
    {
        if ($objectName === null) {
            // Todo: Do a real delegated clear?
            $this->unitOfWork = new UnitOfWork($this);
        } else {
            //TODO
            throw new CouchDBException("DocumentManager#clear(\$objectName) not yet implemented.");
        }
    }
Clears the ObjectManager. All objects that are currently managed
by this ObjectManager become detached.

@param string $objectName if given, only objects of this type will get detached
@throws CouchDBException