private void OnGenerateVisualContent(MeshGenerationContext mgc)
 {
     // This control begs to be fully rewritten and it shouldn't use immediate
     // mode rendering at all. It should maintain its vertex/index lists and only
     // update affected vertices when their respective elements are changed. This
     // way the cost of GenerateVisualContent becomes effectively only two memcpys.
     GraphViewStaticBridge.DrawImmediate(mgc, DrawMinimapContent);
 }