from typing import Optional


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

The parameter `name` is defined as `Optional[str]`, but it is **not optional**, you cannot call the function without the parameter:

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

The `name` parameter is **still required** (not *optional*) because it doesn't have a default value. Still, `name` accepts `None` as the value:

```Python

)

type Man struct {
	ID     int
	Age    int
	Name   string
	Detail string
}

// Panic-safe BeforeUpdate hook that checks for Changed("age")
func (m *Man) BeforeUpdate(tx *gorm.DB) (err error) {
	if !tx.Statement.Changed("age") {
		return nil
	}
	return nil
}

func TestSubModel(t *testing.T) {
	man := Man{Age: 18, Name: "random-name"}
	if err := DB.Create(&man).Error; err != nil {

		{ObjectOpts{}, cfgs[0], false},                                // 1. invalid ObjectOpts missing object name
		{ObjectOpts{Name: "c1test"}, cfgs[0], true},                   // 2. valid ObjectOpts passing empty Filter
		{ObjectOpts{Name: "c1test", VersionID: "vid"}, cfgs[0], true}, // 3. valid ObjectOpts passing empty Filter

        // Verify replaceIfExists flag
        assertEquals(1, buffer[0]);

        // Verify file name length
        int nameLength = SMBUtil.readInt4(buffer, 16);
        assertEquals(fileName.getBytes(StandardCharsets.UTF_16LE).length, nameLength);

        // Verify file name
        byte[] nameBytes = new byte[nameLength];
        System.arraycopy(buffer, 20, nameBytes, 0, nameLength);

        @Option(name = "-s", aliases = "--sessionId", metaVar = "sessionId", usage = "Session ID")
        public String sessionId;

        /** Name for the crawling session for identification purposes. */
        @Option(name = "-n", aliases = "--name", metaVar = "name", usage = "Name")
        public String name;

        /** Comma-separated list of web configuration IDs to crawl. */

      headersBuilder.add(header)
    }

  fun addHeader(
    name: String,
    value: Any,
  ) = apply {
    headersBuilder.add(name, value.toString())
  }

  fun addHeaderLenient(
    name: String,
    value: Any,
  ) = apply {
    addHeaderLenient(headersBuilder, name, value.toString())
  }

  fun setHeader(
    name: String,
    value: Any,
  ) = apply {
    removeHeader(name)

            String name = file.getName();
            if (name.endsWith(SHA_EXTENSION)) {
                shaFiles.add(file);
            } else if (name.endsWith("-LICENSE") || name.endsWith("-LICENSE.txt")) {
                // TODO: why do we support suffix of LICENSE *and* LICENSE.txt??
                licenses.put(name, false);
            } else if (name.contains("-NOTICE") || name.contains("-NOTICE.txt")) {

public class ContainerNotAvailableException extends FessSystemException {

    private static final long serialVersionUID = 1L;

    /** The name of the component that is not available. */
    private String componentName;

    /**
     * Constructor with component name.
     * @param componentName The name of the component that is not available.
     */
    public ContainerNotAvailableException(final String componentName) {

    /**
     * Gets the class name of the query this command handles.
     * @return The query class name.
     */
    protected abstract String getQueryClassName();

    /**
     * Registers this query command with the query processor.
     * Associates this command with its query class name in the processor.
     */
    public void register() {

func TestMany2ManyDuplicateBelongsToAssociation(t *testing.T) {
	user1 := User{Name: "TestMany2ManyDuplicateBelongsToAssociation-1", Friends: []*User{
		{Name: "TestMany2ManyDuplicateBelongsToAssociation-friend-1", Company: Company{
			ID:   1,
			Name: "Test-company-1",
		}},
	}}

	user2 := User{Name: "TestMany2ManyDuplicateBelongsToAssociation-2", Friends: []*User{
		{Name: "TestMany2ManyDuplicateBelongsToAssociation-friend-2", Company: Company{