}
            } else {
                sb.append("      no entries\n");
            }

            List<MetadataGraphEdge> outs = getExcidentEdges(v);
            if (outs != null) {
                for (MetadataGraphEdge e : outs) {
                    sb.append("        to :  ").append(e.toString()).append('\n');
                }
            } else {
                sb.append("      no exit\n");