PhaseSemantics::isDefined

static function isDefined($semanticID)
{
	if(!is_string($semanticID))
	{
		return false;
	}

	$semanticID = mb_strtoupper($semanticID);
	return $semanticID === self::PROCESS
		|| $semanticID === self::SUCCESS
		|| $semanticID === self::FAILURE;
}