code: void disconnectEdge_(int edge) {
  		int cluster_1 = getEdgeCluster(edge, 0);
  		int cluster2 = getEdgeCluster(edge, 1);
  		disconnectEdgeFromCluster_(edge, cluster_1);
  		disconnectEdgeFromCluster_(edge, cluster2);
  	}
docs: Disconnects the edge from its clusters.