@Override
	public ByteProvider getByteProvider(GFile file, TaskMonitor monitor)
			throws IOException, CancelledException {
		if (fsIndexHelper.isPayloadFile(file)) {
			return new ByteProviderWrapper(payloadProvider, file.getFSRL());
		}
		return null;
	}
A pseudo filesystem that contains a single file that is the decompressed contents
of the sparse container file.
Ghidra/Features/FileFormats/src/main/java/ghidra/file/formats/sparseimage/SparseImageFileSystem.java