You can extend the OpenAPI schema for a *path operation* using the parameter `openapi_extra`.

### OpenAPI Extensions

This `openapi_extra` can be helpful, for example, to declare [OpenAPI Extensions](https://github.com/OAI/OpenAPI-Specification/blob/main/versions/3.0.3.md#specificationExtensions):

```Python hl_lines="6"

    ```Python hl_lines="19"
    {!> ../../../docs_src/dependencies/tutorial004.py!}
    ```

...and **FastAPI** will know what to do.

!!! tip
    If that seems more confusing than helpful, disregard it, you don't *need* it.

    - linters:
        - staticcheck
      text: "SA1019: package github.com/golang/protobuf/jsonpb"
    - linters:
        - staticcheck
      text: 'SA1019: "github.com/golang/protobuf/jsonpb"'
    # This is not helpful. The new function is not very usable and the current function will not be removed
    - linters:
        - staticcheck
      text: 'SA1019: grpc.Dial is deprecated: use NewClient instead'
    - linters:

        }
      }
    }
  }

  internal class CallReference(
    referent: RealCall,
    /**
     * Captures the stack trace at the time the Call is executed or enqueued. This is helpful for
     * identifying the origin of connection leaks.
     */
    val callStackTrace: Any?,
  ) : WeakReference<RealCall>(referent)

import java.util.List;
import java.util.stream.Collector;
import org.checkerframework.checker.nullness.qual.Nullable;

/**
 * Provides static methods for working with {@link Comparator} instances. For many other helpful
 * comparator utilities, see either {@code Comparator} itself (for Java 8+), or {@code
 * com.google.common.collect.Ordering} (otherwise).
 *
 * <h3>Relationship to {@code Ordering}</h3>
 *

* 👥 Update FastAPI People. PR [#5571](https://github.com/tiangolo/fastapi/pull/5571) by [@github-actions[bot]](https://github.com/apps/github-actions).

## 0.85.2

### Docs

* ✏ Fix grammar and add helpful links to dependencies in `docs/en/docs/async.md`. PR [#5432](https://github.com/tiangolo/fastapi/pull/5432) by [@pamelafox](https://github.com/pamelafox).

    *   Performance enhancements for StringSplitOp & StringSplitV2Op.
    *   Performance improvements for regex replace operations.
    *   TFRecordWriter now raises an error if .write() fails.
    *   TPU: More helpful error messages in TPUClusterResolvers.
    *   The legacy_init_op argument to SavedModelBuilder methods for adding
        MetaGraphs has been deprecated. Please use the equivalent main_op