@Override
	protected ItemStorage findItemStorage(String folderPath, String itemName)
			throws FileNotFoundException {
		File dir = getFile(folderPath);
		String storageName = mangleName(itemName);
		return new ItemStorage(dir, storageName, folderPath, itemName);
	}
Find an existing storage location
@param folderPath
@param itemName
@return storage location.  A non-null value does not guarantee that the associated 
item actually exists.
@throws FileNotFoundException
Ghidra/Framework/FileSystem/src/main/java/ghidra/framework/store/local/MangledLocalFileSystem.java