| protected isNumFmtIdBuiltInDateFormat ( integer $numFmtId ) : boolean | ||
| $numFmtId | integer | |
| return | boolean | Whether the number format ID indicates that the number is a date |
protected function isNumFmtIdBuiltInDateFormat($numFmtId)
{
return in_array($numFmtId, $this->builtinNumFmtIdIndicatingDates);
}