o campo de chave primária para que, no código Python, possamos *criar um objeto sem um `id`* (`id=None`), assumindo que o banco de dados irá *gerá-lo ao salvar*. O SQLModel entende que o banco de dados fornecerá o `id` e *define a coluna como um `INTEGER` não nulo* no esquema do banco de dados. Veja a [documentação do SQLModel sobre chaves primárias](https://sqlmodel.tiangolo.com/tutorial/create-db-and-table/#primary-key-id) para detalhes.

* `Field(index=True)` informa ao SQLModel que ele...

    public static final String DEFAULT_IGNORE_FAILURE_TYPE = StringUtil.EMPTY;

    /** Default failure count value (-1 indicates no limit). */
    public static final Integer DEFAULT_FAILURE_COUNT = -1;

    /** Default purge day value (-1 indicates no purging). */
    public static final String DEFAULT_PURGE_DAY = "-1";

    /** Default suggest purge day value (30 days). */

     * @return The list of retrieved objects.
     */
    protected <T> List<T> getList(final Class<T> clazz, final String sessionId, final QueryBuilder queryBuilder, final Integer from,
            final Integer size, final SortBuilder<?>... sortBuilders) {
        return getList(clazz, builder -> {
            if (StringUtil.isNotBlank(sessionId)) {
                if (queryBuilder instanceof BoolQueryBuilder) {

  /**
   * Returns a builder that creates immutable sorted multisets with an explicit comparator. If the
   * comparator has a more general type than the set being generated, such as creating a {@code
   * SortedMultiset<Integer>} with a {@code Comparator<Number>}, use the {@link Builder} constructor
   * instead.
   *
   * @throws NullPointerException if {@code comparator} is null
   */

    void testConcurrentNonceGeneration() throws InterruptedException {
        // Given
        int threadCount = 10;
        int noncesPerThread = 1000;
        ConcurrentHashMap<String, Integer> nonceMap = new ConcurrentHashMap<>();
        AtomicInteger collisions = new AtomicInteger(0);
        CountDownLatch latch = new CountDownLatch(threadCount);

    byte[] array = {(byte) 0, (byte) 1, (byte) 2};

    List<Byte> bytes = Arrays.asList((byte) 0, (byte) 1, (byte) 2);
    List<Short> shorts = Arrays.asList((short) 0, (short) 1, (short) 2);
    List<Integer> ints = Arrays.asList(0, 1, 2);
    List<Float> floats = Arrays.asList(0.0f, 1.0f, 2.0f);
    List<Long> longs = Arrays.asList(0L, 1L, 2L);
    List<Double> doubles = Arrays.asList(0.0, 1.0, 2.0);

`int | None` для поля первинного ключа, щоб у Python-коді можна було створити об’єкт без `id` (`id=None`), припускаючи, що база даних згенерує його під час збереження. SQLModel розуміє, що `id` надасть база даних, і визначає стовпець як ненульовий `INTEGER` у схемі бази даних. Докладніше див. [документацію SQLModel про первинні ключі](https://sqlmodel.tiangolo.com/tutorial/create-db-and-table/#primary-key-id).

* `Field(index=True)` каже SQLModel створити **SQL-індекс** для цього стовпця, що...

An error on not-int-const:1 indicates that foo is not an integer constant.
An error on not-num-const:1 indicates that foo is not a number constant.
An error on not-str-lit:1 indicates that foo is not a string literal.
An error on not-signed-int-const:1 indicates that foo is not a signed integer constant.

The line number specifies the name involved. In the example, 1 is foo.

Está diseñado para ser muy simple de usar, y para hacer que cualquier desarrollador integre otros componentes con **FastAPI** de forma muy sencilla.

## Qué es la "Inyección de Dependencias" { #what-is-dependency-injection }

     * @throws NullPointerException if {@code element} is null
     * @throws IllegalArgumentException if {@code occurrences} is negative, or if this operation
     *     would result in more than {@link Integer#MAX_VALUE} occurrences of the element
     */
    @CanIgnoreReturnValue
    public Builder<E> addCopies(E element, int occurrences) {
      requireNonNull(contents); // see the comment on the field