Function realsense_sys::rs2_get_frame_timestamp_domain

pub unsafe extern "C" fn rs2_get_frame_timestamp_domain(
    frameset: *const rs2_frame, 
    error: *mut *mut rs2_error
) -> rs2_timestamp_domain

retrieve timestamp domain from frame handle. timestamps can only be comparable if they are in common domain (for example, depth timestamp might come from system time while color timestamp might come from the device) this method is used to check if two timestamp values are comparable (generated from the same clock) \param[in] frameset handle returned from a callback \param[out] error if non-null, receives any error that occurs during this call, otherwise, errors are ignored \return the timestamp domain of the frame (camera / microcontroller / system time)