@Override
	public LocalFolderItem getItem(String fileID)
			throws IOException, UnsupportedOperationException {
		checkDisposed();
		if (fileIdMap == null) {
			return null;
		}
		Item item = fileIdMap.get(fileID);
		if (item == null) {
			return null;
		}
		try {
			PropertyFile propertyFile = item.itemStorage.getPropertyFile();
			if (propertyFile.exists()) {
				return LocalFolderItem.getFolderItem(this, propertyFile);
			}
		}
		catch (FileNotFoundException e) {
			// ignore
		}
		return null;
	}
Construct existing indexed filesystem with an empty index.
This can be used to prepare for rebuilding the filesystem index.
@param rootPath
@throws IOException
Ghidra/Framework/FileSystem/src/main/java/ghidra/framework/store/local/IndexedV1LocalFileSystem.java