public function save()
{
if (!$this->isModified()) {
return FALSE;
}
$value = array();
foreach ($this->data as $key => $row) {
$value[] = implode($this->columnSeparator, array_merge(array($key), $row));
}
$this->innerAdapter->set($value);
$saved = $this->innerAdapter->save();
$this->modified = FALSE;
return $saved;
}