proc trackPhysicsStep(self: SpatialVelocityTracker): bool {.
gcsafe, locks: 0,
    raises: [], tags: []
.}

proc trackPhysicsStep=(self: SpatialVelocityTracker; val: bool) {.
gcsafe, locks: 0,
    raises: [], tags: []
.}

proc updatePosition(self: SpatialVelocityTracker; position: Vector3) {.
gcsafe,
    locks: 0, raises: [], tags: []
.}

proc getTrackedLinearVelocity(self: SpatialVelocityTracker): Vector3 {.
gcsafe,
    locks: 0, raises: [], tags: []
.}

proc reset(self: SpatialVelocityTracker; position: Vector3) {.
gcsafe, locks: 0,
    raises: [], tags: []
.}