Set<E> incidentEdges();

  Set<E> inEdges();

  Set<E> outEdges();

  /**
   * Returns the set of edges connecting the origin node to {@code node}. For networks without
   * parallel edges, this set cannot be of size greater than one.
   */
  Set<E> edgesConnecting(N node);

  /**
   * Returns the node that is adjacent to the origin node along {@code edge}.
   *

            StringBuilder signature = new StringBuilder();
            signature.append("(");
            for (int i = 0; i < methodDoc.getMetaData().getParameters().size(); i++) {
                if (i > 0) {
                    signature.append(", ");
                }
                signature.append(methodDoc.getMetaData().getParameters().get(i).getName());
            }

            for (Map.Entry<String, Collection<String>> entry : simpleNames.asMap().entrySet()) {
                if (entry.getValue().size() > 1) {
                    StringBuilder warning = new StringBuilder();
                    warning.append(String.format("Multiple DSL types have short name '%s':\n", entry.getKey()));

            bufferIndex += 28; // ???
        }

        bufferIndex = start + daclOffset;

        if (daclOffset != 0) {
            bufferIndex++; // revision
            bufferIndex++;
            int size = ServerMessageBlock.readInt2(buffer, bufferIndex);
            bufferIndex += 2;
            int numAces = ServerMessageBlock.readInt4(buffer, bufferIndex);
            bufferIndex += 4;

            if (numAces > 4096)

        assertEquals(fatals, result.getFatals().size(), String.valueOf(result.getFatals()));
        assertEquals(errors, result.getErrors().size(), String.valueOf(result.getErrors()));
        assertEquals(warnings, result.getWarnings().size(), String.valueOf(result.getWarnings()));
    }

    @Test
    void testMissingModelVersion() throws Exception {

     */
    public static boolean isNumber(final String s) {
        if (isEmpty(s)) {
            return false;
        }

        final int size = s.length();
        for (int i = 0; i < size; i++) {
            final char chr = s.charAt(i);
            if (chr < '0' || '9' < chr) {
                return false;
            }
        }

        return true;
    }

        urlList = fessXpathTransformer.convertChildUrlList(urlList);
        assertEquals(0, urlList.size());

        urlList.clear();
        urlList.add(RequestDataBuilder.newRequestData().get().url("http://www.example.com").build());
        urlList = fessXpathTransformer.convertChildUrlList(urlList);
        assertEquals(1, urlList.size());
        assertEquals("http://www.example.com", urlList.get(0).getUrl());

    private ArrayWithDuplicate(E[] elements, E duplicate) {
      this.elements = elements;
      this.duplicate = duplicate;
    }
  }

  /**
   * @return an array of the proper size with a duplicate element. The size must be at least three.
   */
  protected ArrayWithDuplicate<E> createArrayWithDuplicateElement() {
    E[] elements = createSamplesArray();
    E duplicate = elements[(elements.length / 2) - 1];

        transfers.put(
                new TransferResourceIdentifier(resource),
                new TransferResourceAndSize(resource, event.getTransferredBytes()));

        buffer.append("Progress (").append(transfers.size()).append("): ");

        Iterator<TransferResourceAndSize> entries = transfers.values().iterator();
        while (entries.hasNext()) {
            TransferResourceAndSize entry = entries.next();

        }

        if (_specification != null) {
            builder.setFetchSource(_specification.columnList.toArray(new String[_specification.columnList.size()]), null);
        }

        return builder;
    }

    // ===================================================================================