This example initializes a centered relation-graph view with one inline dataset and then grows it by appending two more `RGJsonData` fragments through gated overlay buttons. It also reuses a draggable helper window for runtime canvas settings and image export, making it a focused reference for deterministic multi-step graph reveal flows.

Append Graph Data in Stages

What This Example Builds

This example renders a centered relationship map that starts with one hub and a small set of connected nodes. A floating helper window lets the user append a second data layer and then a third layer without replacing the graph that is already on screen.

The visual result is intentionally simple: warm beige nodes, straight connectors, and a full-height canvas with very little framing. The main point is the staged reveal flow. Instead of