public function write($data, array $options = array())
{
$class = $options['class'];
$futureData = $class::read(null, array('strategies' => false));
$futureData = array($options['key'] => $data) + $futureData;
unset($futureData['__signature']);
$signature = static::_signature($futureData);
$class::write('__signature', $signature, array('strategies' => false) + $options);
return $data;
}