r1, n := utf8.DecodeRune(s[i:])
			if r1 == utf8.RuneError {
				return i
			}
			i += n
		}
		return -1
	case !utf8.ValidRune(r):
		return -1
	default:
		// Search for rune r using the last byte of its UTF-8 encoded form.
		// The distribution of the last byte is more uniform compared to the
		// first byte which has a 78% chance of being [240, 243, 244].
		var b [utf8.UTFMax]byte

    // we need to keep this in a flag because t.isInterrupted() returns false after t.join()
    AtomicBoolean interrupted = new AtomicBoolean();
    // we need to use another thread because it will be interrupted and thus using
    // the current one, owned by JUnit, would make the test fail
    Thread thread =
        new Thread(
            () -> {
              terminated.set(shutdownAndAwaitTermination(service, 1L, SECONDS));

 * </p>
 * <p>
 * If the source object is a {@link Date}, {@link Calendar}, or {@link java.sql.Date}, the converted object is created using the millisecond value of the source.
 * For other types, the converted object is created from the string representation of the source object.
 * </p>
 * <p>

IMPLIED INCLUDING, WITHOUT LIMITATION, ANY WARRANTIES OR CONDITIONS OF
TITLE, NON-INFRINGEMENT, MERCHANTABILITY OR FITNESS FOR A PARTICULAR
PURPOSE. Each Recipient is solely responsible for determining the
appropriateness of using and distributing the Program and assumes all
risks associated with its exercise of rights under this Agreement,
including but not limited to the risks and costs of program errors,

このOpenAPI固有フィールド`examples`の形は**複数の例**（`list`ではなく）を持つ`dict`であり、それぞれに追加情報が含まれ、その追加情報は**OpenAPI**にも追加されます。

これはOpenAPIに含まれる各JSON Schemaの中には入らず、外側の、*path operation*に直接入ります。

### `openapi_examples`パラメータの使用 { #using-the-openapi-examples-parameter }

FastAPIでは、以下に対してパラメータ`openapi_examples`を使って、OpenAPI固有の`examples`を宣言できます:

* `Path()`
* `Query()`
* `Header()`
* `Cookie()`
* `Body()`
* `Form()`
* `File()`

```

在底层，`open("./somefile.txt")` 会创建一个“上下文管理器”对象。

当 `with` 代码块结束时，它会确保文件被关闭，即使期间发生了异常。

当你用 `yield` 创建一个依赖时，**FastAPI** 会在内部为它创建一个上下文管理器，并与其他相关工具结合使用。

### 在带有 `yield` 的依赖中使用上下文管理器 { #using-context-managers-in-dependencies-with-yield }

/// warning | 警告

这算是一个“高级”概念。

如果你刚开始使用 **FastAPI**，现在可以先跳过。

///

            });
            return processor.getResponse();
        } finally {
            this.threadPool = originalThreadPool;
        }
    }

    /**
     * Encodes the specified value using the character encoding.
     *
     * @param value the value to encode
     * @return the encoded value
     * @throws CurlException if the encoding is unsupported
     */

 * non-value parameters. These must be configured in code.
 *
 * <p>A new {@code CacheBuilder} can be instantiated from a {@code CacheBuilderSpec} using {@link
 * CacheBuilder#from(CacheBuilderSpec)} or {@link CacheBuilder#from(String)}.
 *
 * @author Adam Winer
 * @since 12.0
 */
@SuppressWarnings("GoodTime") // lots of violations (nanosecond math)
@GwtIncompatible

 * non-value parameters. These must be configured in code.
 *
 * <p>A new {@code CacheBuilder} can be instantiated from a {@code CacheBuilderSpec} using {@link
 * CacheBuilder#from(CacheBuilderSpec)} or {@link CacheBuilder#from(String)}.
 *
 * @author Adam Winer
 * @since 12.0
 */
@SuppressWarnings("GoodTime") // lots of violations (nanosecond math)
@GwtIncompatible

import org.codelibs.core.convert.TimestampConversionUtil;
import org.codelibs.core.exception.ConverterRuntimeException;

/**
 * Options to specify when copying JavaBeans or {@link Map} using {@link BeanUtil}.
 *
 * @author higa
 */
public class CopyOptions {

    /**
     * Creates a new {@link CopyOptions} instance.
     */
    public CopyOptions() {
    }

    /**