runCallCount++
            awaitTaskToRun()
          } ?: return

        val currentThread = Thread.currentThread()
        val oldName = currentThread.name
        try {
          while (true) {
            currentThread.name = task.name
            val delayNanos =
              logger.logElapsed(task, task.queue!!) {
                task.runOnce()
              }

)

// prepareValues prepare values slice
func prepareValues(values []interface{}, db *DB, columnTypes []*sql.ColumnType, columns []string) {
	if db.Statement.Schema != nil {
		for idx, name := range columns {
			if field := db.Statement.Schema.LookUpField(name); field != nil {
				values[idx] = reflect.New(reflect.PointerTo(field.FieldType)).Interface()
				continue
			}
			values[idx] = new(interface{})
		}
	} else if len(columnTypes) > 0 {

举个例子，看这段函数：

```python
from typing import Optional


def say_hi(name: Optional[str]):
    print(f"Hey {name}!")
```

参数 `name` 被定义为 `Optional[str]`，但它并不是“可选”的，你不能不传这个参数就调用函数：

```Python
say_hi()  # 哎呀，这会报错！😱
```

参数 `name` 仍然是必填的（不是“可选”），因为它没有默认值。不过，`name` 接受 `None` 作为取值：

```Python
say_hi(name=None)  # 这样可以，None 是有效的 🎉
```

好消息是，在大多数情况下，你可以直接使用 `|` 来定义类型联合：

```python

        // DataOffset field (2 bytes) - should be 24 (16 header + 4 name + 4 padding)
        assertEquals(24, SMBUtil.readInt2(buffer, 10));

        // DataLength field (4 bytes) - should be 32 (lease V1 structure size)
        assertEquals(32, SMBUtil.readInt4(buffer, 12));

        // Verify context name is encoded at offset 16
        byte[] nameBytes = new byte[4];

<div class="wrapper">
    <jsp:include page="/WEB-INF/view/common/admin/header.jsp"></jsp:include>
    <jsp:include page="/WEB-INF/view/common/admin/sidebar.jsp">
        <jsp:param name="menuCategoryType" value="crawl"/>
        <jsp:param name="menuType" value="requestHeader"/>
    </jsp:include>
    <main class="content-wrapper">
        <div class="content-header">
            <div class="container-fluid">

  }

  @CanIgnoreReturnValue
  private File newDir(String name) {
    File file = new File(rootDir, name);
    file.mkdir();
    return file;
  }

  @CanIgnoreReturnValue
  private File newFile(String name) throws IOException {
    File file = new File(rootDir, name);
    file.createNewFile();
    return file;
  }

  }

  @CanIgnoreReturnValue
  private File newDir(String name) {
    File file = new File(rootDir, name);
    file.mkdir();
    return file;
  }

  @CanIgnoreReturnValue
  private File newFile(String name) throws IOException {
    File file = new File(rootDir, name);
    file.createNewFile();
    return file;
  }

	opts := natsserver.DefaultTestOptions
	opts.Port = 14222
	s := natsserver.RunServer(&opts)
	defer s.Shutdown()

	clientConfig := &NATSArgs{
		Enable: true,
		Address: xnet.Host{
			Name:      "localhost",
			Port:      (xnet.Port(opts.Port)),
			IsPortSet: true,
		},
		Subject: "test",
	}
	con, err := clientConfig.connectNats()
	if err != nil {
		t.Errorf("Could not connect to nats: %v", err)

        final String myName = getSchedulerTargetName();

        final String[] targets = target.split(",");
        for (String name : targets) {
            name = name.trim();
            if (Constants.DEFAULT_JOB_TARGET.equalsIgnoreCase(name) || StringUtil.isNotBlank(myName) && myName.equalsIgnoreCase(name)) {
                return true;
            }
        }
        return false;
    }

    }

    /**
     * Returns whether the property is a target property.
     *
     * @param name
     *            The property name
     * @return Whether the property is a target property
     */
    protected boolean isTargetProperty(final String name) {
        if (prefix != null && !name.startsWith(prefix)) {
            return false;
        }
        if (!includePropertyNames.isEmpty()) {