public function getFileSize($strUnit, $blnFormatted = false)
	{
		$doubleFileSize = \Document::convertFileSize($this->intFileSize, self::FILE_SIZE_UNIT_BYTE, $strUnit);
		if ($doubleFileSize < 0)
		{
			throw new \Exception(sprintf('Invalid file size [%s] or unit [%s] for document.', $this->intFileSize, $strKey));
		}
		
		if ($blnFormatted)
		{
			return \Document::formatFileSize($doubleFileSize, $strUnit);
		}
		
		return $doubleFileSize;
	}