* authoritative source (maven central).
 * We are then able to map the unreleased version to branches in git and Gradle projects that are capable of checking
 * out and building them, so we can include these in the testing plan as well.
 */
public class BwcVersions {

    private static final Pattern LINE_PATTERN = Pattern.compile(

app = FastAPI()


@app.post("/items/")
async def create_item(item: Item, project_id: Annotated[int, Query(...)]): ...
```

## Return Type or Response Model

When possible, include a return type. It will be used to validate, filter, document, and serialize the response.

```python
from fastapi import FastAPI
from pydantic import BaseModel

app = FastAPI()

 * crawling and indexing documents, including incremental crawling capabilities, content
 * modification checking, and integration with the Fess search engine backend.
 *
 * <p>Key features include:</p>
 * <ul>
 * <li>Incremental crawling support with last-modified timestamp checking</li>
 * <li>Document expiration handling</li>
 * <li>Child URL extraction and queueing</li>

            for (ResolutionNode node : result.getArtifactResolutionNodes()) {
                Artifact artifact = node.getArtifact();

                if (resolutionFilter == null || resolutionFilter.include(artifact)) {
                    executor.execute(new ResolveTask(
                            classLoader, latch, artifact, session, node.getRemoteRepositories(), result));
                } else {

Observe que os valores padrão podem ser qualquer coisa, não apenas `None`.

Eles podem ser uma lista (`[]`), um `float` de `10.5`, etc.

///

### `response_model_include` e `response_model_exclude` { #response-model-include-and-response-model-exclude }

Você também pode usar os parâmetros `response_model_include` e `response_model_exclude` do *decorador de operação de rota*.

 *
 * Written by Doug Lea with assistance from members of JCP JSR-166
 * Expert Group and released to the public domain, as explained at
 * http://creativecommons.org/publicdomain/zero/1.0/
 * Other contributors include Andrew Wright, Jeffrey Hayes,
 * Pat Fisher, Mike Judd.
 */

package com.google.common.util.concurrent;

import static com.google.common.collect.Iterables.getOnlyElement;

 * reference. It allows you to represent "a {@code T} that must be present" and a "a {@code T} that
 * might be absent" as two distinct types in your program, which can aid clarity.
 *
 * <p>Some uses of this class include
 *
 * <ul>
 *   <li>As a method return type, as an alternative to returning {@code null} to indicate that no
 *       value was available

 * of {@link java.util.Formatter} specifiers. However, note that if the number of arguments does not
 * match the number of occurrences of {@code "%s"} in the format string, {@code Verify} will still
 * behave as expected, and will still include all argument values in the error message; the message
 * will simply not be formatted exactly as intended.
 *
 * <h3>More information</h3>
 *

  @GuardedBy("monitor")
  private void checkCurrentState(State expected) {
    State actual = state();
    if (actual != expected) {
      if (actual == FAILED) {
        // Handle this specially so that we can include the failureCause, if there is one.
        throw new IllegalStateException(
            "Expected the service " + this + " to be " + expected + ", but the service has FAILED",
            failureCause());
      }

Зверніть увагу, що типові значення можуть бути будь-якими, не лише `None`.

Це може бути list (`[]`), `float` зі значенням `10.5` тощо.

///

### `response_model_include` та `response_model_exclude` { #response-model-include-and-response-model-exclude }

Ви також можете використовувати параметри *декоратора операції шляху* `response_model_include` та `response_model_exclude`.