* Autocompletado.
    * Chequeo de tipos.
* Validación de datos:
    * Errores automáticos y claros cuando los datos son inválidos.
    * Validación incluso para objetos JSON profundamente anidados.
* <dfn title="también conocido como: serialización, parsing, marshalling">Conversión</dfn> de datos de entrada: de la red a los datos y tipos de Python. Leyendo desde:
    * JSON.
    * Parámetros de path.

    }

    /**
     * Returns a {@link CopyOptions} with a date converter applied.
     *
     * @param pattern
     *            The date pattern. Must not be {@literal null} or an empty string.
     * @param propertyNames
     *            An array of property names. Each element must not be {@literal null} or an empty string.
     * @return A {@link CopyOptions} with a date converter applied.

// along with this program.  If not, see <http://www.gnu.org/licenses/>.

package http

// Standard S3 HTTP response constants
const (
	LastModified       = "Last-Modified"
	Date               = "Date"
	ETag               = "ETag"
	ContentType        = "Content-Type"
	ContentMD5         = "Content-Md5"
	ContentEncoding    = "Content-Encoding"
	Expires            = "Expires"

    @Test
    public void test_ofNullable_withDate() {
        Date testValue = new Date();
        OptionalEntity<Date> result = OptionalUtil.ofNullable(testValue);

        assertNotNull(result);
        assertTrue(result.isPresent());
        assertEquals(testValue, result.get());
    }

    @Test
    public void test_ofNullable_withNullDate() {
        Date testValue = null;

Si no declaras un response model, FastAPI usará el `jsonable_encoder` explicado en [Codificador Compatible con JSON](../tutorial/encoder.md) y lo pondrá en un `JSONResponse`.

                + ",createAction=0x" + Hexdump.toHexString(this.createAction, 4) + ",creationTime=" + new Date(this.creationTime)
                + ",lastAccessTime=" + new Date(this.lastAccessTime) + ",lastWriteTime=" + new Date(this.lastWriteTime) + ",changeTime="
                + new Date(this.changeTime) + ",extFileAttributes=0x" + Hexdump.toHexString(this.extFileAttributes, 4) + ",allocationSize="

{
    "properties": {
      "createdAt": {
        "type": "date",
        "format": "date_optional_time"
      },
      "updatedAt": {
        "type": "date",
        "format": "date_optional_time"
      }
    }

        request.setUserProperties(userProperties);

        return this;
    }

    @Override
    public Date getBuildStartTime() {
        return request.getBuildStartTime();
    }

    @Override
    public ModelBuildingRequest setBuildStartTime(Date buildStartTime) {
        request.setBuildStartTime(buildStartTime);

        return this;
    }

    @Override

    private final Integer buildNumber;

    RemoteSnapshotMetadata(Artifact artifact, Date timestamp, Integer buildNumber) {
        super(createRepositoryMetadata(artifact), null, timestamp);
        this.buildNumber = buildNumber;
    }

    private RemoteSnapshotMetadata(Metadata metadata, Path path, Date timestamp, Integer buildNumber) {
        super(metadata, path, timestamp);
        this.buildNumber = buildNumber;

        .byteCount(),
    ).isEqualTo(20L)
  }

  @Test fun addDate() {
    val expected = Date(0L)
    val headers =
      Headers
        .Builder()
        .add("testDate", expected)
        .build()
    assertThat(headers["testDate"]).isEqualTo("Thu, 01 Jan 1970 00:00:00 GMT")
    assertThat(headers.getDate("testDate")).isEqualTo(Date(0L))
  }

  @Test fun addInstant() {
    val expected = Instant.ofEpochMilli(0L)