+SR_PRIV int std_hw_dev_acquisition_stop_serial(struct sr_dev_inst *sdi,
+ void *cb_data, dev_close_t hw_dev_close_fn,
+ struct sr_serial_dev_inst *serial, const char *prefix);
+SR_PRIV int std_session_send_df_header(const struct sr_dev_inst *sdi,
+ const char *prefix);