*
   * @param patternStr the pattern string on which to filter file names
   * @throws PatternSyntaxException if pattern compilation fails (runtime)
   */
  public PatternFilenameFilter(String patternStr) {
    this(Pattern.compile(patternStr));
  }

  /**
   * Constructs a pattern file name filter object.
   *
   * @param pattern the pattern on which to filter file names
   */
  public PatternFilenameFilter(Pattern pattern) {

 * Filters files based on wildcard patterns and DOS file attributes.
 */
public class DosFileFilter implements SmbFileFilter {

    /**
     * The wildcard pattern for filtering file names.
     */
    protected String wildcard;

    /**
     * The DOS file attributes to filter on.
     */
    protected int attributes;

    /**

type Reader struct {
	args         *ReaderArgs
	readCloser   io.ReadCloser          // raw input
	buf          *bufio.Reader          // input to the splitter
	columnNames  []string               // names of columns
	nameIndexMap map[string]int64       // name to column index
	current      [][]string             // current block of results to be returned
	recordsRead  int                    // number of records read in current slice

    sslSocket: SSLSocket,
    hostname: String?,
    protocols: List<@JvmSuppressWildcards Protocol>,
  ) {
    val sslParameters = sslSocket.sslParameters

    val names = alpnProtocolNames(protocols)

    sslParameters.applicationProtocols = names.toTypedArray()

    sslSocket.sslParameters = sslParameters
  }

  @SuppressSignatureCheck
  override fun getSelectedProtocol(sslSocket: SSLSocket): String? =
    try {

 * It interacts with the OpenSearch client to create, update, and delete analyzer settings, as well as to retrieve
 * analyzer names and mappings.
 *
 * <p>Key functionalities include:</p>
 * <ul>
 *   <li>Initializing analyzer settings and mappings.</li>
 *   <li>Retrieving analyzer names for different fields and languages.</li>
 *   <li>Updating and deleting analyzer settings.</li>

            // The order here is important! tokens are inserted by the transformer
            Map<String, Object> parameters = new HashMap<>();
            // NOTE: These parameter names _must_ match the setter names in ReleaseNotesTransformer
            parameters.put("baseCss", getBaseCssFile().get().getAsFile());
            parameters.put("releaseNotesCss", getReleaseNotesCssFile().get().getAsFile());

    /** The set of field names for content. */
    protected final Set<String> contentFieldNameSet = new HashSet<>();

    /** The set of field names for tags. */
    protected final Set<String> tagFieldNameSet = new HashSet<>();

    /** The set of field names for roles. */
    protected final Set<String> roleFieldNameSet = new HashSet<>();

    /** The list of content field names. */

I think `Union[SomeType, None]` is more explicit about what it means.

It's just about the words and names. But those words can affect how you and your teammates think about the code.

As an example, let's take this function:

```python
from typing import Optional


def say_hi(name: Optional[str]):

// Set whether to uniquify imported operation names. If true, imported operation
// names will be modified if their name already exists in the graph. If false,
// conflicting names will be treated as an error. Note that this option has no
// effect if a prefix is set, since the prefix will guarantee all names are
// unique. Defaults to false.

 */
@NullUnmarked
@GwtIncompatible
@J2ktIncompatible
public class HttpHeadersTest extends TestCase {

  public void testConstantNameMatchesString() throws Exception {
    // Special case some of the weird HTTP Header names...
    ImmutableBiMap<String, String> specialCases =
        ImmutableBiMap.<String, String>builder()
            .put("CDN_LOOP", "CDN-Loop")
            .put("ETAG", "ETag")
            .put("SOURCE_MAP", "SourceMap")