# Showcase

The flagship tour of `XWUIChartGraphBlockBase`, the shared base every chart tier graph variant subclasses. It shows how one tiny subclass plus a static `variant` block becomes a complete chart, the three wire data shapes the base accepts (flat nodes with links, nested nodes with children, series only), per instance layout overrides, and the block, size and canvas switches.

It closes with a topology board: a connectivity view and an ownership view of the same production graph, built from two variants of the same base.