return sb.toString();
    }

    // ===================================================================================
    //                                                                            Accessor
    //                                                                            ========
    public Long getGidNumber() {
        checkSpecifiedProperty("gidNumber");
        return gidNumber;
    }

        return sb.toString();
    }

    // ===================================================================================
    //                                                                            Accessor
    //                                                                            ========
    public String getCreatedBy() {
        checkSpecifiedProperty("createdBy");
        return convertEmptyToNull(createdBy);

 *       elements were added (insertion order)
 * </ul>
 *
 * <p>{@code Network}s built by this class also guarantee that each collection-returning accessor
 * returns a <b>(live) unmodifiable view</b>; see <a
 * href="https://github.com/google/guava/wiki/GraphsExplained#accessor-behavior">the external
 * documentation</a> for details.
 *
 * <p>Examples of use:
 *
 * {@snippet :
 * // Building a mutable network

        return sb.toString();
    }

    // ===================================================================================
    //                                                                            Accessor
    //                                                                            ========
    public String getCreatedBy() {
        checkSpecifiedProperty("createdBy");
        return convertEmptyToNull(createdBy);

        return sb.toString();
    }

    // ===================================================================================
    //                                                                            Accessor
    //                                                                            ========
    public String getCreatedBy() {
        checkSpecifiedProperty("createdBy");
        return convertEmptyToNull(createdBy);

    } else {
      return ImmutableSet.of();
    }
  }

  /**
   * Returns the successors of the given node, or an empty set if this set does not represent
   * outgoing edges.
   */
  private Set<N> successorsOrEmpty(N node) {
    if (edgeType == EdgeType.OUTGOING || edgeType == EdgeType.BOTH) {
      return graph.successors(node);
    } else {
      return ImmutableSet.of();
    }
  }

      }

      @Override
      public Set<N> predecessors(N node) {
        return AbstractValueGraph.this.predecessors(node);
      }

      @Override
      public Set<N> successors(N node) {
        return AbstractValueGraph.this.successors(node);
      }

      @Override
      public int degree(N node) {
        return AbstractValueGraph.this.degree(node);
      }

      @Override

      assertThat(graph.adjacentNodes(node)).isEqualTo(asGraph.adjacentNodes(node));
      assertThat(graph.predecessors(node)).isEqualTo(asGraph.predecessors(node));
      assertThat(graph.successors(node)).isEqualTo(asGraph.successors(node));
      assertThat(graph.degree(node)).isEqualTo(asGraph.degree(node));
      assertThat(graph.inDegree(node)).isEqualTo(asGraph.inDegree(node));

    }

    @Override
    public Set<N> predecessors(N node) {
      return network.predecessors(node);
    }

    @Override
    public Set<N> successors(N node) {
      return network.successors(node);
    }

    @Override
    public Set<E> incidentEdges(N node) {
      return network.incidentEdges(node);
    }

    @Override
    public Set<E> inEdges(N node) {

        return sb.toString();
    }

    // ===================================================================================
    //                                                                            Accessor
    //                                                                            ========
    public Long getCreatedTime() {
        checkSpecifiedProperty("createdTime");
        return createdTime;
    }