model.track() not found

[hescluke]

When I run seg.py, I can't find the definition of model.track() in line 153 (

Segment-Any-Video/track.py

Line 153 in ebb31cb

results = model.track(frame, persist=True, imgsz=imgsz, device=device)

) of track.py. Is this YOLO.track? But YOLO.track() doesn't have imgsz and device.