    linkView.getBBox([opt])

Return a bounding box of the link view.

If `opt.useModelGeometry` option is set to `true`, the resulting bounding box is calculated based on the dimensions of the link model. (This means that a simplified polyline is used and portions of curved links may be sticking out of the reported bounding box.) This behavior is similar to the `link.getBBox` function – but the `linkView` function transforms the bounding box to match `joint.dia.Paper` translation and scaling.