private static void installKeymap(@Nullable Document document) throws InvalidDataException {
if (document == null) {
throw new InvalidDataException();
}
final KeymapImpl vimKeyMap = new KeymapImpl();
final KeymapManagerImpl keymapManager = (KeymapManagerImpl) KeymapManager.getInstance();
final Keymap[] allKeymaps = keymapManager.getAllKeymaps();
vimKeyMap.readExternal(document.getRootElement(), allKeymaps);
keymapManager.addKeymap(vimKeyMap);
}
