private String startFolderSizeCalculation(FSFolder folder) {
		String resultString;
		try {
			ObjectContainer<Long> result = new ObjectContainer<Long>((long) 0);
			calculateFolderSize(folder, result);
			resultString = getSizeString(result.o);
		}
		catch (Exception e) {
			e.printStackTrace();
			resultString = "Exception while calculating! See debug console for info...";
		}
		return resultString;
	}
@see org.catacombae.hfsexplorer.gui.FSEntrySummaryPanel
GPL/DMG/src/dmg/java/mobiledevices/dmg/reader/DmgInfoGenerator.java