/**
* Retrieve the underlaying resource.
*
* This method is called in response to stream_select().
*
* @param integer $cast_as Can be STREAM_CAST_FOR_SELECT when stream_select() is calling stream_cast() or STREAM_CAST_AS_STREAM when stream_cast() is called for other uses.
* @return resource Should return the underlying stream resource used by the wrapper, or FALSE.
*/
public function stream_cast($cast_as)
{
return $this->streamWrapper->cast($cast_as);
}