docs: private void interiorLineInteriorPoint_(int cluster, int id_a, int id_b,
  			int cluster_index_a) {
  		if (m_matrix[MatrixPredicate.InteriorInterior] == 0)
  			return;
  
  		int clusterParentage = m_topo_graph.getClusterParentage(cluster);
  
  		if ((clusterParentage & id_a) != 0 && (clusterParentage & id_b) != 0) {
  			int index = m_topo_graph.getClusterUserIndex(cluster,
  					cluster_index_a);
  
  			if (index % 2 == 0) {
  				m_matrix[MatrixPredicate.InteriorInterior] = 0;
  			}
  		}
  	}