static public function askForUserConfirmation(bool $throwException = false): bool {
		echo "\n######################################################\n\n";
		echo "Are you sure that you want to import data to the following instance?! \n\n ";
		echo "Type 'yes' to continue! \n\n";
		echo self::get('sparqlUrl') . "\n";
		echo self::get('fedoraApiUrl') . "\n";
		$handle = fopen ("php://stdin","r");
		$line = trim(fgets($handle));
		fclose($handle);
		if ($line !== 'yes' && $throwException) {
			throw new RuntimeException('Configuration revoked by the user');
		}
		return $line === 'yes';
	}