API uygulamanızın *external API*'yi çağırdığı sırada gerçekleşen sürece "callback" denir. Çünkü dış geliştiricinin yazdığı yazılım API'nize bir request gönderir ve ardından API'niz geri çağrı yaparak (*call back*), bir *external API*'ye request gönderir (muhtemelen aynı geliştiricinin oluşturduğu).

    }
    Entry<K, ? extends V> entry1 = entryItr.next();
    K key1 = entry1.getKey();
    V value1 = entry1.getValue();
    checkEntryNotNull(key1, value1);
    // Do something that works for j2cl, where we can't call getDeclaredClass():
    EnumMap<K, V> enumMap = new EnumMap<>(singletonMap(key1, value1));
    while (entryItr.hasNext()) {
      Entry<K, ? extends V> entry = entryItr.next();
      K key = entry.getKey();

    }
    Entry<K, ? extends V> entry1 = entryItr.next();
    K key1 = entry1.getKey();
    V value1 = entry1.getValue();
    checkEntryNotNull(key1, value1);
    // Do something that works for j2cl, where we can't call getDeclaredClass():
    EnumMap<K, V> enumMap = new EnumMap<>(singletonMap(key1, value1));
    while (entryItr.hasNext()) {
      Entry<K, ? extends V> entry = entryItr.next();
      K key = entry.getKey();

You can also pass the file path to the `fastapi dev` command, and it will guess the FastAPI app object to use:

```console
$ fastapi dev main.py
```

But you would have to remember to pass the correct path every time you call the `fastapi` command.

// 500 Internal Server Error.
type MetricsLoaderFn func(context.Context, MetricValues, *metricsCache) error

// JoinLoaders - joins multiple loaders into a single loader. The returned
// loader will call each of the given loaders in order. If any of the loaders
// return an error, the returned loader will return that error.
func JoinLoaders(loaders ...MetricsLoaderFn) MetricsLoaderFn {

   *
   * <p><b>Note:</b> The returned map's values are guaranteed to be of type {@link SortedSet}. To
   * obtain this map with the more specific generic type {@code Map<K, SortedSet<V>>}, call {@link
   * Multimaps#asMap(SortedSetMultimap)} instead. <b>However</b>, the returned map <i>itself</i> is
   * not necessarily a {@link SortedMap}: A {@code SortedSetMultimap} must expose the <i>values</i>

		fmt.Println(scanner.Text()) // Println will add back the final '\n'
	}
	if err := scanner.Err(); err != nil {
		fmt.Fprintln(os.Stderr, "reading standard input:", err)
	}
}

// Return the most recent call to Scan as a []byte.
func ExampleScanner_Bytes() {
	scanner := bufio.NewScanner(strings.NewReader("gopher"))
	for scanner.Scan() {
		fmt.Println(len(scanner.Bytes()) == 6)
	}
	if err := scanner.Err(); err != nil {

func (e *lockedLastMinuteLatency) add(value time.Duration) {
	e.addSize(value, 0)
}

// addSize will add a duration and size.
func (e *lockedLastMinuteLatency) addSize(value time.Duration, sz int64) {
	// alloc on every call, so we have a clean entry to swap in.
	t := time.Now().Unix()
	e.init.Do(func() {
		e.cached.Store(&AccElem{})
		atomic.StoreInt64(&e.cachedSec, t)
	})
	acc := e.cached.Load()

            .that(BigDecimalMath.roundToDouble(input, mode))
            .isEqualTo(expectation);
      }

      if (!expectedValues.containsKey(UNNECESSARY)) {
        assertWithMessage("Expected roundUnnecessaryShouldThrow call")
            .that(unnecessaryShouldThrow)
            .isTrue();
        assertThrows(
            "Expected ArithmeticException for roundToDouble(" + input + ", UNNECESSARY)",
            ArithmeticException.class,

				var argValues []reflect.Value
				for _, arg := range args {
					argValues = append(argValues, reflect.ValueOf(arg))
				}

				results := reflect.ValueOf(s).MethodByName(name).Call(argValues)
				if len(results) > 0 {
					v = results[0].Interface()
				}
			}

			if c.name == "" {
				c.name = getFuncName(c.h)
			}

			if c.before != "" {