SR_PRIV int scpi_cmd(const struct sr_dev_inst *sdi, int command, ...);
SR_PRIV int scpi_cmd_resp(const struct sr_dev_inst *sdi, GVariant **gvar,
const GVariantType *gvtype, int command, ...);
SR_PRIV int select_channel(const struct sr_dev_inst *sdi, struct sr_channel *ch);
SR_PRIV int scpi_cmd(const struct sr_dev_inst *sdi, int command, ...);
SR_PRIV int scpi_cmd_resp(const struct sr_dev_inst *sdi, GVariant **gvar,
const GVariantType *gvtype, int command, ...);
SR_PRIV int select_channel(const struct sr_dev_inst *sdi, struct sr_channel *ch);