code: def test_clustering_directed_large(self):
      g = Graph.Ring(50, directed=True)
      clu = VertexClustering(g, [0] * 3 + [1] * 17 + [2] * 30)
      fig = go.Figure()
      plot(
          clu,
          layout=self.layout_large_ring,
          target=fig,
          mark_groups=True,
      )
      return fig
  
imports: import unittest
  from igraph import Graph, plot, VertexClustering
label_desc: Use image node_id 5 for calling the ClusteringTestRunner obj's underlying member method code with example usage: obj.test_clustering_directed_large() and returns: fig