message:    "Encountered an invalid record type.",
		statusCode: 400,
		cause:      err,
	}
}

// ////////////////////////////////////////////////////////////////////////////////////
//
//	SQL parsing errors.
//
// ////////////////////////////////////////////////////////////////////////////////////
func errLexerInvalidChar(err error) *s3Error {
	return &s3Error{
		code:       "LexerInvalidChar",

The `str | None` (Python 3.10+) or `Union` in `Union[str, None]` (Python 3.9+) is not used by FastAPI to determine that the value is not required, it will know it's not required because it has a default value of `= None`.

But adding the type annotations will allow your editor to give you better support and detect errors.

///

## Without Pydantic { #without-pydantic }

import java.util.Set;
import org.jspecify.annotations.Nullable;

/**
 * CompactLinkedHashSet is an implementation of a Set, which a predictable iteration order that
 * matches the insertion order. All optional operations (adding and removing) are supported. All
 * elements, including {@code null}, are permitted.
 *
 * <p>{@code contains(x)}, {@code add(x)} and {@code remove(x)}, are all (expected and amortized)

import java.util.Spliterators;
import org.jspecify.annotations.Nullable;

/**
 * CompactLinkedHashSet is an implementation of a Set, which a predictable iteration order that
 * matches the insertion order. All optional operations (adding and removing) are supported. All
 * elements, including {@code null}, are permitted.
 *
 * <p>{@code contains(x)}, {@code add(x)} and {@code remove(x)}, are all (expected and amortized)

   */
  @CanIgnoreReturnValue
  public static UnsignedLong valueOf(String string, int radix) {
    return fromLongBits(UnsignedLongs.parseUnsignedLong(string, radix));
  }

  /**
   * Returns the result of adding this and {@code val}. If the result would have more than 64 bits,
   * returns the low 64 bits of the result.
   *
   * @since 14.0
   */
  public UnsignedLong plus(UnsignedLong val) {

package lifecycle

import (
	"encoding/xml"
	"fmt"
	"testing"

	"github.com/dustin/go-humanize"
)

// TestUnsupportedFilters checks if parsing Filter xml with
// unsupported elements returns appropriate errors
func TestUnsupportedFilters(t *testing.T) {
	testCases := []struct {
		inputXML    string
		expectedErr error
	}{
		{ // Filter with And tags

Todo o processo que era aplicado para parâmetros de rota também é aplicado para parâmetros de consulta:

* Suporte do editor (obviamente)
* <abbr title="convertendo uma string que vem de um request HTTP em um dado Python">"Parsing"</abbr> de dados
* Validação de dados
* Documentação automática

## Valores padrão { #defaults }

Como os parâmetros de consulta não são uma parte fixa da rota, eles podem ser opcionais e podem ter valores padrão.

Todo el mismo proceso que se aplica para los parámetros de path también se aplica para los parámetros de query:

* Soporte del editor (obviamente)
* <abbr title="convirtiendo el string que viene de un request HTTP en datos de Python">"parsing"</abbr> de datos
* Validación de datos
* Documentación automática

## Valores por defecto { #defaults }

But if you are certain that the content that you are returning is **serializable with JSON**, you can pass it directly to the response class and avoid the extra overhead that FastAPI would have by passing your return content through the `jsonable_encoder` before passing it to the response class.

{* ../../docs_src/custom_response/tutorial001b_py39.py hl[2,7] *}

/// info

    @Override
    public void notifyNewValue(@Nullable V newValue) {
      if (newValue != null) {
        // The pending load was clobbered by a manual write.
        // Unblock all pending gets, and have them return the new value.
        set(newValue);
      } else {
        // The pending load was removed. Delay notifications until loading completes.
        oldValue = unset();
      }