/**
* Append value to a stream
*
* @param mixed $val
*/
public function append($val)
{
$ref =& $this->value->getRef();
$ref .= (string) $val;
$this->value->touch();
}
/**
* Signal, that value is updated by external code.
*
* Should be used together with getRef()
*/
public function touch()
{
$this->_memContainer->touch();
}