Acho que `Union[SomeType, None]` é mais explícito quanto ao significado.

É apenas uma questão de palavras e nomes. Mas essas palavras podem influenciar como você e sua equipe pensam sobre o código.

Como exemplo, veja esta função:

```python
from typing import Optional


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

            tasks.withType(Zip.class).named("bundlePlugin").configure(zip -> zip.from(licenseFile.getParentFile(), copySpec -> {
                copySpec.include(licenseFile.getName());
                copySpec.rename(s -> "LICENSE.txt");
            }));
        }

        final var noticeFile = extension.getNoticeFile();
        if (noticeFile != null) {

                pw.println("the API name (and its components) can be used as method names, and update the");
                pw.println("list of keywords below. The safest action is to rename the API to avoid conflicts.");
                pw.println();
                pw.printf("Keywords source: %s%n", getJsonKeywords());
                pw.println();

 *
 * @author Kevin Bourrillion
 */
@GwtCompatible
@NullMarked
public class SampleElements<E extends @Nullable Object> implements Iterable<E> {
  // TODO: rename e3, e4 => missing1, missing2
  private final E e0;
  private final E e1;
  private final E e2;
  private final E e3;
  private final E e4;

  public SampleElements(E e0, E e1, E e2, E e3, E e4) {
    this.e0 = e0;

        if ((s = Config.getProperty("jcifs.smb1.smb.client.TreeConnectAndX.OpenAndX")) != null) {
            batchLimits[5] = Byte.parseByte(s);
        }
        if ((s = Config.getProperty("jcifs.smb1.smb.client.TreeConnectAndX.Rename")) != null) {
            batchLimits[6] = Byte.parseByte(s);
        }
        if ((s = Config.getProperty("jcifs.smb1.smb.client.TreeConnectAndX.Transaction")) != null) {
            batchLimits[7] = Byte.parseByte(s);

 *
 * @author Kevin Bourrillion
 */
@GwtCompatible
@NullMarked
public class SampleElements<E extends @Nullable Object> implements Iterable<E> {
  // TODO: rename e3, e4 => missing1, missing2
  private final E e0;
  private final E e1;
  private final E e2;
  private final E e3;
  private final E e4;

  public SampleElements(E e0, E e1, E e2, E e3, E e4) {
    this.e0 = e0;

	"os"
	pathutil "path"
	"strings"
	"sync"
	"time"

	"github.com/minio/minio/internal/grid"
	xioutil "github.com/minio/minio/internal/ioutil"
)

func renameAllBucketMetacache(epPath string) error {
	// Rename all previous `.minio.sys/buckets/<bucketname>/.metacache` to
	// to `.minio.sys/tmp/` for deletion.
	return readDirFn(pathJoin(epPath, minioMetaBucket, bucketMetaPrefix), func(name string, typ os.FileMode) error {

        assertTrue(checkTarget.exists(), "Target file should exist after rename");

        // Verify content is preserved
        try (InputStream in = checkTarget.getInputStream()) {
            String readContent = new String(in.readAllBytes(), "UTF-8");
            assertEquals(content, readContent, "Content should be preserved after rename");
        }

        // Best effort to verify source is gone

		defer lk.Unlock(lkctx)
	}

	er.cleanupMultipartPath(ctx, paths...) // cleanup all part.N.meta, and skipped part.N's before final rename().

	defer func() {
		if err == nil {
			er.deleteAll(context.Background(), minioMetaMultipartBucket, uploadIDPath)
		}
	}()

	// Rename the multipart object to final location.

        case SMB_COM_OPEN_ANDX:
            return cfg.getBatchLimit("TreeConnectAndX.OpenAndX");
        case SMB_COM_RENAME:
            return cfg.getBatchLimit("TreeConnectAndX.Rename");
        case SMB_COM_TRANSACTION:
            return cfg.getBatchLimit("TreeConnectAndX.Transaction");
        case SMB_COM_QUERY_INFORMATION:
            return cfg.getBatchLimit("TreeConnectAndX.QueryInformation");