Add grouping sample to readme

README.md

@@ -94,6 +94,10 @@ You can find the full documentation [here](https://yworks.github.io/yfiles-jupyt
         <td><a href="https://github.com/yWorks/yfiles-jupyter-graphs/blob/main/examples/30_leaflet_mapping.ipynb"><img src="https://raw.githubusercontent.com/yWorks/yfiles-jupyter-graphs/main/screenshots/leaflet_map.png" title="Use a Map background" alt="leaflet mapping"></a>
         <a href="https://github.com/yWorks/yfiles-jupyter-graphs/blob/main/examples/30_leaflet_mapping.ipynb">Use a Map Background</a><br><a target="_blank" href="https://colab.research.google.com/github/yWorks/yfiles-jupyter-graphs/blob/main/examples/30_leaflet_mapping.ipynb"><img src="https://colab.research.google.com/assets/colab-badge.svg" alt="Open In Colab"/></a></td>
     </tr>
+    <tr>
+        <td><a href="https://github.com/yWorks/yfiles-jupyter-graphs/blob/main/examples/31_nested_graphs.ipynb"><img src="https://raw.githubusercontent.com/yWorks/yfiles-jupyter-graphs/main/screenshots/nesting.png" title="Visualize nested data" alt="nested graph"></a>
+        <a href="https://github.com/yWorks/yfiles-jupyter-graphs/blob/main/examples/31_nested_graphs.ipynb">Visualize nested data</a><br><a target="_blank" href="https://colab.research.google.com/github/yWorks/yfiles-jupyter-graphs/blob/main/examples/31_nested_graphs.ipynb"><img src="https://colab.research.google.com/assets/colab-badge.svg" alt="Open In Colab"/></a></td>
+    </tr>
 </table>
 
 For example code look [here](https://github.com/yWorks/yfiles-jupyter-graphs/tree/master/examples).

mkdocs/index.md

@@ -54,6 +54,10 @@ A graph diagram visualization widget for Jupyter Notebooks and Labs powered by [
         <td><a href="https://github.com/yWorks/yfiles-jupyter-graphs/blob/main/examples/30_leaflet_mapping.ipynb"><img src="https://raw.githubusercontent.com/yWorks/yfiles-jupyter-graphs/main/screenshots/leaflet_map.png" title="Use a Map background" alt="leaflet mapping"></a><br>
         <a href="https://github.com/yWorks/yfiles-jupyter-graphs/blob/main/examples/30_leaflet_mapping.ipynb">Use a Map Background</a></td>
     </tr>
+    <tr>
+        <td><a href="https://github.com/yWorks/yfiles-jupyter-graphs/blob/main/examples/31_nested_graphs.ipynb"><img src="https://raw.githubusercontent.com/yWorks/yfiles-jupyter-graphs/main/screenshots/nesting.png" title="Visualize nested data" alt="nested graph"></a><br>
+        <a href="https://github.com/yWorks/yfiles-jupyter-graphs/blob/main/examples/31_nested_graphs.ipynb">Visualize nested data</a></td>
+    </tr>
 </table>
 
 For example code look [here](https://github.com/yWorks/yfiles-jupyter-graphs/tree/master/examples).