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No it's here https://docs.opencv.org/master/dc/d6b/group__video__track.html#gae94247c0014ff6497a3f85e60eab0a66

No it's here https://docs.opencv.org/master/dc/d6b/group__video__track.html#gae94247c0014ff6497a3f85e60eab0a66https://docs.opencv.org/master/dc/d6b/group__video__track.html#gae94247c0014ff6497a3f85e60eab0a66 and source code here

No No it's here https://docs.opencv.org/master/dc/d6b/group__video__track.html#gae94247c0014ff6497a3f85e60eab0a66 and source code here

No it's here https://docs.opencv.org/master/dc/d6b/group__video__track.html#gae94247c0014ff6497a3f85e60eab0a66 and source code here

But it was introduced un this PR after opencv 4.0.1 release and opencv 3.4.5 release