New renders+css

src/v2/core/RendererRegistry.ts

@@ -0,0 +1,9 @@
+import { IGroupingRenderer } from './IGroupingRenderer';
+
+export class RendererRegistry {
+  constructor(private renderers: IGroupingRenderer[]) {}
+
+  get(type: string): IGroupingRenderer | undefined {
+    return this.renderers.find(r => r.type === type);
+  }
+}