}
        return null;
    }

    /**
     * Deletes the user code cookie from the client browser.
     * This method removes the user identification cookie by setting it to an empty value with zero max age.
     *
     * @param request the HTTP servlet request
     */
    public void deleteUserCodeFromCookie(final HttpServletRequest request) {

  }

  /**
   * Returns a {@code new Object()} for every request, and increments a counter for every request.
   * An {@code Integer} loader that returns the key for {@code load} requests, and increments the
   * old value on {@code reload} requests. The load counts are accessible via {@link #getLoadCount}
   * and {@link #getReloadCount}.
   */
  static class IncrementingLoader extends CacheLoader<Integer, Integer> {

```Python
{
    "name": "Barz",
    "price": 3,
    "description": None,
}
```

because it doesn't include the already stored attribute `"tax": 20.2`, the input model would take the default value of `"tax": 10.5`.

And the data would be saved with that "new" `tax` of `10.5`.

## Partial updates with `PATCH` { #partial-updates-with-patch }

// removed from remote tier. If remote object is to be deleted, returns the
// corresponding tier deletion journal entry and true. Otherwise returns empty
// jentry value and false.
func (os *objSweeper) shouldRemoveRemoteObject() (jentry, bool) {
	if os.TransitionStatus != lifecycle.TransitionComplete {
		return jentry{}, false
	}

// modified accidentally or maliciously.
type Error struct {
	msg   string
	cause error
}

// Errorf - formats according to a format specifier and returns
// the string as a value that satisfies error of type crypto.Error
func Errorf(format string, a ...any) error {
	e := fmt.Errorf(format, a...)
	ee := Error{}
	ee.msg = e.Error()
	ee.cause = errors.Unwrap(e)
	return ee
}

// [io.ByteScanner], and [io.RuneScanner] interfaces by reading from
// a byte slice.
// Unlike a [Buffer], a Reader is read-only and supports seeking.
// The zero value for Reader operates like a Reader of an empty slice.
type Reader struct {
	s        []byte
	i        int64 // current reading index
	prevRune int   // index of previous rune; or < 0
}

///

### 理解这段代码 { #understand-that-code }

关键点仅仅是：在 `Annotated` 中使用带函数的 **`AfterValidator`**。不感兴趣可以跳过这一节。🤸

---

但如果你对这个具体示例好奇，并且还愿意继续看，这里有一些额外细节。

#### 字符串与 `value.startswith()` { #string-with-value-startswith }

注意到了吗？字符串的 `value.startswith()` 可以接收一个元组，它会检查元组中的每个值：

{* ../../docs_src/query_params_str_validations/tutorial015_an_py310.py ln[16:19] hl[17] *}

#### 一个随机条目 { #a-random-item }

		HTTPStatusCode: http.StatusBadRequest,
	},
	ErrSTSInvalidParameterValue: {
		Code:           "InvalidParameterValue",
		Description:    "An invalid or out-of-range value was supplied for the input parameter.",
		HTTPStatusCode: http.StatusBadRequest,
	},
	ErrSTSWebIdentityExpiredToken: {
		Code:           "ExpiredToken",

    #    #  The column name of version no for optimistic lock.
    #    #  Basically you don't need this if your tables have the column 'VERSION_NO'.
    #    #  because the default value is 'VERSION_NO'.
    #    ; versionNoFieldName = VERSION_NO
    #}
    # - - - - - - - - - -/
}

        sb.append(comp);
        append = true;
      }
      dummy ^= sb.toString().length();
    }
    return dummy;
  }

  /**
   * Starts with an empty delimiter and changes to the desired value at the end of the iteration.
   */
  @Benchmark
  int assignDelimiter(int reps) {
    int dummy = 0;
    for (int i = 0; i < reps; i++) {
      StringBuilder sb = new StringBuilder();
      String delim = "";