public function getType($classIdentifier)
    {
        if (array_key_exists($classIdentifier, $this->classIdentifierToTypeNameMap)) {
            return $this->classIdentifierToTypeNameMap[$classIdentifier];
        } else {
            throw new FormatNotSupportedException('There is no target type for class name "' . $classIdentifier . '"',
                1451995790);
        }
    }