In the examples we use a `MSS` type, which is a `map[string]string` that is `msgp` serializable.

```go
    handler := func(request *grid.MSS) (*grid.MSS, *grid.RemoteErr) {
        fmt.Println("Got request with field", request["myfield"])
        // Do something with payload
        return NewMSSWith(map[string]string{"result": "ok"}), nil
    }

    // Create a typed handler.

            }
        }
    }

    private
    fun KtFile.getSince(declaringClass: CtClass, field: CtField, fallback: String?): SinceTagStatus =
        "${declaringClass.baseQualifiedKotlinName}.${field.name}".let { fqn ->
            collectDescendantsOfType<KtProperty>()
                .firstOrNull { it.fqName?.asString() == fqn }
                .getSinceStatus(fallback)

* `Field(primary_key=True)` tells SQLModel that the `id` is the **primary key** in the SQL database (you can learn more about SQL primary keys in the SQLModel docs).

    assert response.json() == snapshot(
        {
            "detail": [
                {
                    "type": "missing",
                    "loc": ["header", "save_data"],
                    "msg": "Field required",
                    "input": {
                        "x_tag": [],
                        "host": "testserver",
                        "accept": "*/*",
                        "accept-encoding": "gzip, deflate",

    assert response.json() == snapshot(
        {
            "detail": [
                {
                    "type": "missing",
                    "loc": ["header", "save_data"],
                    "msg": "Field required",
                    "input": {"x_tag": [], "host": "testserver"},
                }
            ]
        }
    )


def test_header_param_model_extra(client: TestClient):
    response = client.get(

    /** @deprecated use lifecycles instead */
    @Deprecated
    private Map<String, LifecyclePhase> phases;

    /**
     * Default ctor for plexus compatibility: lifecycles are most commonly defined in Plexus XML, that does field
     * injection. Still, for Plexus to be able to instantiate this class, default ctor is needed.
     *
     * @deprecated Should not be used in Java code.
     */
    @Deprecated
    public DefaultLifecycleMapping() {}

        ComponentLookupException e =
                assertThrows(ComponentLookupException.class, () -> container.lookup(MySingletonBean2.class));
        assertTrue(e.getMessage().matches("[\\s\\S]*: Can not set .* field .* to [\\s\\S]*"));

        MySingletonBean bean = container.lookup(MySingletonBean.class);
        assertNotNull(bean);
        assertNotNull(bean.anotherBean);

}

public final class mockwebserver3/SocketEffect$ShutdownConnection : mockwebserver3/SocketEffect {
	public static final field INSTANCE Lmockwebserver3/SocketEffect$ShutdownConnection;
}

public final class mockwebserver3/SocketEffect$Stall : mockwebserver3/SocketEffect {
	public static final field INSTANCE Lmockwebserver3/SocketEffect$Stall;
}

public abstract interface class mockwebserver3/SocketHandler {

            "msg": "value is not a valid integer",
            "type": "type_error.integer"
        }
    ]
}
```

you will get a text version, with:

```
Validation errors:
Field: ('path', 'item_id'), Error: Input should be a valid integer, unable to parse string as an integer
```

### Override the `HTTPException` error handler { #override-the-httpexception-error-handler }

			// incorrectly believed that the old GNU format had a prefix field.
			// This is wrong and leads to an output file that mangles the
			// atime and ctime fields, which are often left unused.
			//
			// In order to continue reading tar files created by former, buggy
			// versions of Go, we skeptically parse the atime and ctime fields.
			// If we are unable to parse them and the prefix field looks like