Hello, I want to ask some questions about the demo code in SDK. 1)In MinimalGazeDataStream, what is lightlyfiletered gaze data stream and how? 2)There are two mode in fixation data mode, what is the difference about sensitive and slow? 3）How do you get the fixation point？Using I-DT algorithm or I-VT algorithm or others? 4)Is there any detailed guidelines or help files about the SDK? I really come across a lot of questions during my job. Thanks!