public override List <Landmark[]> GetValue()
        {
            MpLandmarkListVector landmarkListVector = UnsafeNativeMethods.MpPacketGetNormalizedLandmarkListVector(ptr);
            var landmarks = LandmarkListVector.PtrToLandmarkArrayList(landmarkListVector);

            UnsafeNativeMethods.MpLandmarkListVectorDestroy(landmarkListVector);

            return(landmarks);
        }