@Override
	public SymbolServerInputStream getFileStream(String filename, TaskMonitor monitor)
			throws IOException {
		return new SymbolServerInputStream(new ByteArrayInputStream(dummyPayload),
			dummyPayload.length);
	}
A "remote" symbol server that answers affirmatively for any query.
Ghidra/Features/PDB/src/test/java/pdb/symbolserver/DummySymbolServer.java