This example shows an animated Voronoi treemap that transitions between two different weightings of global GDP data, with regions color-coded and labeled by country. The visualization moves between two hierarchies, demonstrating how cells morph and rearrange when weights are altered. The implementation uses `d3-voronoi-treemap` to generate the tessellations, `flubber` to create smooth polygon interpolations, and `d3.select`/`.append` for SVG rendering. The code computes two copies of the hierarchy, alters their weights, and pairs cells by name to animate the transition, with a checkbox to toggle inner cell visibility.