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:

{* ../../docs_src/python_types/tutorial009c.py hl[1,4] *}

             * base URL inheritance on the module directory names as this information is unavailable for POMs in the
             * repository. In other words, modules where artifactId != moduleDirName will see different effective URLs
             * depending on how the model was constructed (from filesystem or from repository).
             */

  }

  /**
   * Asserts that the collection under test contains exactly the elements it was initialized with
   * plus the given elements, according to {@link #expectContents(java.util.Collection)}. In other
   * words, for the default {@code expectContents()} implementation, the number of occurrences of
   * each given element has increased by one since the test collection was created, and the number

    /** The key of the message: All these words */
    public static final String LABELS_advance_search_must_queries = "{labels.advance_search_must_queries}";

    /** The key of the message: Phrase search of these words */
    public static final String LABELS_advance_search_phrase_query = "{labels.advance_search_phrase_query}";

    /** The key of the message: Any of these words */

            return FormatType.LABEL;
        }
        if ("popular-words".equals(type)) {
            return FormatType.POPULARWORD;
        }
        if ("favorites".equals(type)) {
            return FormatType.FAVORITES;
        }
        if ("health".equals(type)) {
            return FormatType.PING;
        }
        if ("suggest-words".equals(type)) {
            return FormatType.SUGGEST;
        }

   * in no particular order.
   *
   * <p>The returned array will be "safe" in that no references to it are maintained by this queue.
   * (In other words, this method must allocate a new array). The caller is thus free to modify the
   * returned array.
   *
   * <p>This method acts as bridge between array-based and collection-based APIs.
   *

// "Context" under which operations/functions are executed. It encapsulates
// things like the available devices, resource manager etc.
// TFE_Context must outlive all tensor handles created using it. In other
// words, TFE_DeleteContext() must be called after all tensor handles have
// been deleted (with TFE_DeleteTensorHandle).
//
// TODO(ashankar): Merge with TF_Session?
typedef struct TFE_Context TFE_Context;

	}
	return releaseTime, err
}

// parseReleaseData - parses release info file content fetched from
// official minio download server.
//
// The expected format is a single line with two words like:
//
// fbe246edbd382902db9a4035df7dce8cb441357d minio.RELEASE.2016-10-07T01-16-39Z.<hotfix_optional>
//
// The second word must be `minio.` appended to a standard release tag.

// function breaks the input into lines with line termination stripped. [Scanner.Split]
// functions are defined in this package for scanning a file into
// lines, bytes, UTF-8-encoded runes, and space-delimited words. The
// client may instead provide a custom split function.
//
// Scanning stops unrecoverably at EOF, the first I/O error, or a token too
// large to fit in the [Scanner.Buffer]. When a scan stops, the reader may have

pkg go/doc/comment, type Parser struct, LookupPackage func(string) (string, bool) #51082
pkg go/doc/comment, type Parser struct, LookupSym func(string, string) bool #51082
pkg go/doc/comment, type Parser struct, Words map[string]string #51082
pkg go/doc/comment, type Plain string #51082
pkg go/doc/comment, type Printer struct #51082
pkg go/doc/comment, type Printer struct, DocLinkBaseURL string #51082