Use `Objects.requireNonNull` statement or `Preconditions` rather than `assert` or `@SuppressWarning` annotation to suppress if possible.

For gradual adoption, enable checks project-by-project.
Do not rely on `@NullMarked` annotations.
Only enable checks for a project if all its dependencies have checks enabled, in order to avoid back-and-forth when refining the annotations.

### Invalid Return Type Annotations { #invalid-return-type-annotations }

But when you return some other arbitrary object that is not a valid Pydantic type (e.g. a database object) and you annotate it like that in the function, FastAPI will try to create a Pydantic response model from that type annotation, and will fail.

 * under the License.
 */

/**
 * Provides annotations for Maven plugin development, including mojo configuration,
 * parameter definitions, and lifecycle bindings. These annotations are used to
 * generate plugin descriptors and configure plugin behavior.
 *
 * @since 4.0.0
 */

        }
    }
)


class User(BaseModel):
    username: str


# Here we use string annotations to test them
def get_current_user(oauth_header: "str" = Security(reusable_oauth2)):
    user = User(username=oauth_header)
    return user


@app.post("/login")
# Here we use string annotations to test them
def login(form_data: "OAuth2PasswordRequestFormStrict" = Depends()):
    return form_data

import com.google.errorprone.annotations.FormatMethod;
import java.lang.annotation.Annotation;
import java.lang.annotation.Inherited;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.reflect.Method;
import java.util.Locale;
import junit.framework.TestCase;

/**

- the documentation: la documentation

- Exclude from OpenAPI: Exclusion d'OpenAPI

- framework: framework (do not translate to cadre)
- performance: performance

- type hints: annotations de type
- type annotations: annotations de type

- autocomplete: autocomplétion
- autocompletion: autocomplétion

- the request (what the client sends to the server): la requête

7. Here the `response_model` is using a type annotation of a list of `Author` dataclasses.

    Again, you can combine `dataclasses` with standard type annotations.

8. Notice that this *path operation function* uses regular `def` instead of `async def`.

    As always, in FastAPI you can combine `def` and `async def` as needed.

import com.google.errorprone.annotations.FormatMethod;
import java.lang.annotation.Annotation;
import java.lang.annotation.Inherited;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.reflect.Method;
import java.util.Locale;
import junit.framework.TestCase;

/**

            <offlineLink>
              <url>https://javadoc.io/doc/com.google.j2objc/j2objc-annotations/latest/</url>
              <location>${project.basedir}/javadoc-link/j2objc-annotations</location>
            </offlineLink>
            <offlineLink>
              <url>https://errorprone.info/api/latest/</url>

If you need or want to work with **GraphQL**, [**Strawberry**](https://strawberry.rocks/) is the **recommended** library as it has the design closest to **FastAPI's** design, it's all based on **type annotations**.

Depending on your use case, you might prefer to use a different library, but if you asked me, I would probably suggest you try **Strawberry**.

Here's a small preview of how you could integrate Strawberry with FastAPI: