Item parseIndexItem(Folder parent, String entry) {
		int index = entry.indexOf(INDEX_ITEM_SEPARATOR);
		if (index < 0) {
			return null;
		}
		String storageName = entry.substring(0, index);
		String name = entry.substring(index + 1);
		return new Item(parent, name, storageName);
	}
Attempt to parse index version
@param firstIndexLine
@return index version or -1 if index version unknown
Ghidra/Framework/FileSystem/src/main/java/ghidra/framework/store/local/IndexedLocalFileSystem.java