public function read($id)
{
$retval = $this->hs->executeSingle($this->hsIndex, '=', [$id], 1, 0);
if (!isset($retval[0], $retval[0][2])) {
return '';
}
$this->fields['id'] = $retval[0][0];
$this->fields['modified'] = $retval[0][1];
$this->fields['data'] = '';
return $retval[0][2];
}