return {
          keyboard: Promise.resolve(null),
          metadata: null
      }

  protected prepareKeyboardForActivation(
    keyboardId: string,
    languageCode?: string
  ): {keyboard: Promise<Keyboard>, metadata: KeyboardStub} {

    if(!keyboardId) {
      return {
        keyboard: Promise.resolve(null),
        metadata: null
      }
    }

    // Set default language code
    languageCode ||= '';

    // Check that the saved keyboard is currently registered
    const requestedStub: KeyboardStub = this.keyboardCache.getStub(keyboardId, languageCode);

    if(!requestedStub) {
      const availableStubList = this.keyboardCache.getStubList().map(stub => `${stub.KI}@${stub.KLC}`);
      throw new Error(`No matching stub has been registered for keyboard ${keyboardId}.  Available stubs: ${JSON.stringify(availableStubList)}`);
    }

    // Check if current keyboard matches requested keyboard, but not (necessarily) stub
    if (keyboardId === this.activeKeyboard?.metadata?.id) {
      const {keyboard} = this.activeKeyboard;
      // In this case, the keyboard is loaded; just update the stub.

      return {
        keyboard: Promise.resolve(keyboard),
        metadata: requestedStub
      };
    }