+ * @brief Set or unset TTS focus of the webview.
+ * @param[in] focused True if it is gained, false lost.
+ * @return true if succeeded, false otherwise.
+ * @note It only works when the webview does not have keyinput focus. If it has keyinput focus, the TTS focus is set automatically.
+ */
+ void SetTtsFocus(bool focused);
+
+ /**