public function map($callback)
{
$data =& $this->getValue();
if ($data != null && is_array($data)) {
$toMap =& $data;
} else {
$toMap = array($data);
}
$mapped = new ValueWrapper(array());
foreach ($toMap as $key => $value) {
$mappedVal = $callback($key, $value, new DataWrapper($this, $key), new ValueWrapperRef($value));
static::unwrapValue($mappedVal);
$mapped->set($key, $mappedVal);
}
return $mapped;
}
