return converter.getAsObject((String) value);
            }
            return converter.getAsString(value);
        } catch (final Throwable cause) {
            throw new ConverterRuntimeException(destPropertyName, value, cause);
        }
    }

    /**
     * クラスに対応するコンバータを探します。
     *
     * @param clazz
     *            クラス
     * @return コンバータ
     */

		}
	case config.CallhomeSubSys:
		cfg, err := callhome.LookupConfig(s[config.CallhomeSubSys][config.Default])
		if err != nil {
			return err
		}
		// callhome cannot be enabled if license is not registered yet, throw an error.
		if cfg.Enabled() && !globalSubnetConfig.Registered() {
			return errors.New("Deployment is not registered with SUBNET. Please register the deployment via 'mc license register ALIAS'")
		}
	case config.DriveSubSys:

{!../../docs_src/python_types/tutorial009c.py!}
```

Tham số `name` được định nghĩa là `Optional[str]`, nhưng nó **không phải là tùy chọn**, bạn không thể gọi hàm mà không có tham số:

```Python
say_hi()  # Oh, no, this throws an error! 😱
```

Tham số `name` **vẫn được yêu cầu** (không phải là *tùy chọn*) vì nó không có giá trị mặc định. Trong khi đó, `name` chấp nhận `None` như là giá trị:

```Python

{!../../docs_src/python_types/tutorial009c.py!}
```

O paâmetro `name` é definido como `Optional[str]`, mas ele **não é opcional**, você não pode chamar a função sem o parâmetro:

```Python
say_hi()  # Oh, no, this throws an error! 😱
```

O parâmetro `name` **ainda é obrigatório** (não *opicional*) porque ele não possui um valor padrão. Mesmo assim, `name` aceita `None` como valor:

```Python

m.shouldChangeDisplay=d.addValidClassOnAll,m;var n=b.valAttr("ignore");return n&&a.each(n.split(""),function(a,b){g=g.replace(new RegExp("\\"+b,"g"),"")}),a.split(j,function(h){0!==h.indexOf("validate_")&&(h="validate_"+h);var i=a.formUtils.validators[h];if(!i)throw new Error('Using undefined validator "'+h+'". Maybe you have forgotten to load the module that "'+h+'" belongs to?');if("validate_checkbox_group"===h&&(b=e.find('[name="'+b.attr("name")+'"]:eq(0)')),("keyup"!==f||i.validateOnKeyUp)&&(k=i.validator...

   * are inclusive). For example, to match any lowercase letter of the English alphabet, use {@code
   * CharMatcher.inRange('a', 'z')}.
   *
   * @throws IllegalArgumentException if {@code endInclusive < startInclusive}
   */
  public static CharMatcher inRange(final char startInclusive, final char endInclusive) {
    return new InRange(startInclusive, endInclusive);
  }

public class QueryHelperTest extends UnitFessTestCase {

    private QueryHelper queryHelper;

    private QueryFieldConfig queryFieldConfig;

    @Override
    public void setUp() throws Exception {
        super.setUp();
        queryHelper = new QueryHelper() {
            protected QueryParser getQueryParser() {
                QueryParser queryParser = new QueryParser();

            userInfoBhv.delete(userInfo);
        } else if (e instanceof final SearchLog searchLog) {
            searchLogBhv.delete(searchLog);
        } else {
            throw new FessSystemException("Unknown log entity: " + e);
        }
    }

    scheduling. In your debugger you will see new thread names and more use of daemon threads.

 *  Fix: Don't drop callbacks on unexpected exceptions. When an interceptor throws an unchecked
    exception the callback is now notified that the call was canceled. The exception is still sent
    to the uncaught exception handler for reporting and recovery.

	if errCode != ErrNone {
		return cred, "", "", time.Time{}, errCode
	}

	// Verify if region is valid.
	region = signV4Values.Credential.scope.region

	// Extract date, if not present throw error.
	var dateStr string
	if dateStr = req.Header.Get("x-amz-date"); dateStr == "" {
		if dateStr = r.Header.Get("Date"); dateStr == "" {
			return cred, "", "", time.Time{}, ErrMissingDateHeader
		}
	}