Function SoapySDRDevice_getChannelSettingInfoWithKey 

pub unsafe extern "C" fn SoapySDRDevice_getChannelSettingInfoWithKey(
    device: *const SoapySDRDevice,
    direction: c_int,
    channel: usize,
    key: *const c_char,
) -> SoapySDRArgInfo

Get information on a specific channel setting.

\param device a pointer to a device instance \param direction the channel direction RX or TX \param channel an available channel on the device \param key the setting identifier \return a list of argument info structures