private void setupInitialSymbolServer() {
		SymbolServerService temporarySymbolServerService =
			PdbPlugin.getSymbolServerService(symbolServerInstanceCreatorContext);
		if (temporarySymbolServerService
				.getSymbolStore() instanceof LocalSymbolStore tempLocalSymbolStore) {
			setSymbolStorageLocation(tempLocalSymbolStore.getRootDir(), false);
			tableModel.addSymbolServers(temporarySymbolServerService.getSymbolServers());
			setConfigChanged(false);
		}
	}
Dialog that allows the user to configure the Pdb search locations and symbol directory
Ghidra/Features/PDB/src/main/java/pdb/symbolserver/ui/ConfigPdbDialog.java