You will see your docs including a "Callbacks" section for your *path operation* that shows how the *external API* should look like:

{!../../../docs_src/openapi_callbacks/tutorial001.py!}
```

!!! tip
     `callback_url` 🔢 🔢 ⚙️ Pydantic <a href="https://docs.pydantic.dev/latest/concepts/types/#urls" class="external-link" target="_blank">📛</a> 🆎.

🕴 🆕 👜 `callbacks=messages_callback_router.routes` ❌ *➡ 🛠️ 👨‍🎨*. 👥 🔜 👀 ⚫️❔ 👈 ⏭.

## 🔬 ⏲

☑ ⏲ 📟 🔜 🪀 🙇 🔛 👆 👍 🛠️ 📱.

&amp; ⚫️ 🔜 🎲 🪀 📚 ⚪️➡️ 1️⃣ 📱 ⏭.

⚫️ 💪 1️⃣ ⚖️ 2️⃣ ⏸ 📟, 💖:

```Python

```

!!! tip "提示"

    `callback_url` 查询参数使用 Pydantic 的 <a href="https://pydantic-docs.helpmanual.io/usage/types/#urls" class="external-link" target="_blank">URL</a> 类型。

此处唯一比较新的内容是*路径操作装饰器*中的 `callbacks=invoices_callback_router.routes` 参数，下文介绍。

## 存档回调

实际的回调代码高度依赖于您自己的 API 应用。

并且可能每个应用都各不相同。

回调代码可能只有一两行，比如：

```Python
callback_url = "https://example.com/api/v1/invoices/events/"

  Status enqueue_status_ TF_GUARDED_BY(mu_);
  std::unique_ptr<BlockingCounter> counter_;

  Coordinator* coord_;

  std::atomic<bool> stopped_;

  mutex cb_mu_;
  std::vector<std::function<void(Status)>> callbacks_;

  mutable std::unique_ptr<mutex> cg_mu_;
  std::unique_ptr<CostGraphDef> cost_graph_ TF_GUARDED_BY(cg_mu_);
  RunOptions run_options_;
};

}  // namespace tensorflow

  private val callbacks: Deque<Any> = ArrayDeque()

  @AfterEach
  fun after() {
    assertThat(callbacks).isEmpty()
  }

  @Test
  fun multiline() {
    consumeEvents(
      """
      |data: YHOO
      |data: +2
      |data: 10
      |
      |
      """.trimMargin(),
    )
    assertThat(callbacks.remove()).isEqualTo(Event(null, null, "YHOO\n+2\n10"))
  }

}

type callbackRecorder struct {
	callbacks int64
}

func (c *callbackRecorder) callback(key, value any) {
	atomic.AddInt64(&c.callbacks, 1)
}

func TestTTLEvictionCallback(t *testing.T) {
	c := &callbackRecorder{callbacks: 0}
	ttl := NewTTLWithCallback(50*time.Millisecond, time.Millisecond, c.callback)
	testCacheEvicter(ttl)
	if atomic.LoadInt64(&c.callbacks) != 1 {

			}
		}

		if len(data.err) > 0 && err == nil {
			t.Errorf("callbacks tests #%v should got error %v, but not", idx+1, data.err)
		} else if len(data.err) == 0 && err != nil {
			t.Errorf("callbacks tests #%v should not got error, but got %v", idx+1, err)
		}

		if ok, msg := assertCallbacks(callbacks.Create(), data.results); !ok {
			t.Errorf("callbacks tests #%v failed, got %v", idx+1, msg)
		}
	}
}

*/
import "C"

import (
	"testing"
)

var callbacks int

//export IMPIsOpaque
func IMPIsOpaque() {
	callbacks++
}

//export IMPInitWithFrame
func IMPInitWithFrame() {
	callbacks++
}

//export IMPDrawRect
func IMPDrawRect() {
	callbacks++
}

//export IMPWindowResize
func IMPWindowResize() {
	callbacks++
}

func test4029(t *testing.T) {

// The map value is not designed to be thread-safe.
type MapValue struct {
	typeValue *types.Type

	// values are previously evaluated values obtained from callbacks
	values map[string]ref.Val
	// callbacks are a map of field name to the function that returns the field Val
	callbacks map[string]GetFieldFunc
	// knownValues are registered names, used for iteration
	knownValues []string
}

func NewMapValue(objectType ref.Type) *MapValue {

package tests

import (
	"gorm.io/gorm"
	"gorm.io/gorm/callbacks"
	"gorm.io/gorm/clause"
	"gorm.io/gorm/logger"
	"gorm.io/gorm/schema"
)

type DummyDialector struct {
	TranslatedErr error
}

func (DummyDialector) Name() string {
	return "dummy"
}

func (DummyDialector) Initialize(db *gorm.DB) error {
	callbacks.RegisterDefaultCallbacks(db, &callbacks.Config{