* Called after {@link #successorIterator} is exhausted. Advances {@link #node} to the next node
   * and updates {@link #successorIterator} to iterate through the successors of {@link #node}.
   */
  final boolean advance() {
    checkState(!successorIterator.hasNext());
    if (!nodeIterator.hasNext()) {
      return false;
    }
    node = nodeIterator.next();
    successorIterator = graph.successors(node).iterator();
    return true;
  }

  // First pass: filters out the entries of the slices.
  std::unordered_set<string> filtered_keys;
  BundleEntryProto entry;
  v2_reader_->Seek(kHeaderEntryKey);
  for (v2_reader_->Next(); v2_reader_->Valid(); v2_reader_->Next()) {
    CHECK(entry.ParseFromArray(v2_reader_->value().data(),
                               v2_reader_->value().size()))
        << entry.InitializationErrorString();

        while (properties.hasNext()) {
            Map.Entry property = (Map.Entry) properties.next();
            String key = (String) property.getKey();
            StringBuffer value = new StringBuffer();
            Iterator values = ((List) property.getValue()).iterator();
            while (values.hasNext()) {
                value.append(values.next());
                if (values.hasNext()) value.append(", ");
            }

     */
    @Test
    public void testEntrySet() throws Exception {
        Iterator<Map.Entry<String, String>> i = map.entrySet().iterator();
        assertThat(i.next().getKey(), is(nullValue()));
        assertThat(i.next().getKey(), is("1"));
        assertThat(i.next().getKey(), is("2"));
    }

    /**
     * Test method for {@link org.seasar.util.collection.ArrayIterator#remove()}
     * .
     */
    @Test

 *       next task will wait for any running callable (or pending {@code Future} returned by an
 *       {@code AsyncCallable}) to complete, without interrupting it (and without calling {@code
 *       cancel} on the {@code Future}). So beware: <i>Even if you cancel every preceding {@code
 *       Future} returned by this class, the next task may still have to wait.</i>.

	)

	r := newMockReader(failAfter, mockData)
	scanner := newScanner(r)

	for i < 1000 {
		c := scanner.next()
		if c == byte(0) {
			break
		}
		if c != mockData {
			t.Fatalf("expected \"%s\", got \"%s\"", string(mockData), string(c))
		}
		i++
	}
	c := scanner.next()
	if scanner.readerErr == nil {
		t.Fatalf("failed to receive expected error after %d bytes", failAfter)
	}
	if c != byte(0) {

{!../../docs_src/using_request_directly/tutorial001.py!}
```

Ao declarar o parâmetro com o tipo sendo um `Request` em sua *função de operação de rota*, o **FastAPI** saberá como passar o `Request` neste parâmetro.

/// tip | "Dica"

Note que neste caso, nós estamos declarando o parâmetro da rota ao lado do parâmetro da requisição.

Assim, o parâmetro da rota será extraído, validado, convertido para o tipo especificado e anotado com OpenAPI.

     *
     * @param resultSet
     *            結果セット。{@literal null}であってはいけません
     * @return 次に進めたかどうか
     */
    public static boolean next(final ResultSet resultSet) {
        assertArgumentNotNull("resultSet", resultSet);

        try {
            return resultSet.next();
        } catch (final SQLException ex) {
            throw new SQLRuntimeException(ex);
        }
    }

    /**
     * カーソルを指定した位置まで進めます。

    int hash = Hashing.smearedHash(key);
    int tableIndex = hash & mask;
    int next = tableGet(table, tableIndex);
    if (next == UNSET) {
      return -1;
    }
    int hashPrefix = getHashPrefix(hash, mask);
    int lastEntryIndex = -1;
    do {
      int entryIndex = next - 1;
      int entry = entries[entryIndex];
      if (getHashPrefix(entry, mask) == hashPrefix

    Iterator<String> keyIterator = keys.iterator();
    keyIterator.next();
    keyIterator.remove();
    assertFalse(underlying.containsKey("c"));

    Collection<String> values = map.values();
    values.remove("4");
    assertFalse(underlying.containsKey("d"));

    Iterator<String> valueIterator = values.iterator();
    valueIterator.next();
    valueIterator.remove();
    assertFalse(underlying.containsKey("e"));