*/
@GwtCompatible
@SuppressWarnings("serial") // uses writeReplace(), not default serialization
final class RegularImmutableBiMap<K, V> extends ImmutableBiMap<K, V> {
  @SuppressWarnings("unchecked") // TODO(cpovirk): Consider storing Entry<?, ?>[] instead.
  static final RegularImmutableBiMap<Object, Object> EMPTY =
      new RegularImmutableBiMap<>(
          null, null, (Entry<Object, Object>[]) ImmutableMap.EMPTY_ENTRY_ARRAY, 0, 0);

La forma recomendada de manejar el *startup* y el *shutdown* es usando el parámetro `lifespan` de la app de `FastAPI` como se describió arriba. Si proporcionas un parámetro `lifespan`, los manejadores de eventos `startup` y `shutdown` ya no serán llamados. Es solo `lifespan` o solo los eventos, no ambos.

Probablemente puedas saltarte esta parte.

///

Hay una forma alternativa de definir esta lógica para ser ejecutada durante el *startup* y durante el *shutdown*.

		totalFileSize := int64(-1) // For compressed objects length will be unknown (represented by length=-1)
		if length != -1 {
			bitrotSumsTotalSize := ceilFrac(length, shardSize) * int64(h.Size()) // Size used for storing bitrot checksums.
			totalFileSize = bitrotSumsTotalSize + length
		}
		rb.CloseWithError(disk.CreateFile(context.TODO(), origvolume, volume, filePath, totalFileSize, rb))
	}()
	return bw
}

 * and field configuration handling during the document transformation process.
 */
public interface FessTransformer {

    /**
     * Synchronized LRU cache for storing parent URL encodings.
     * Maps session+parent URL keys to their corresponding character encodings.
     */
    Map<String, String> parentEncodingMap = Collections.synchronizedMap(new LruHashMap<>(1000));

    /**

     */
    public RelatedContentHelper() {
        super();
    }

    private static final Logger logger = LogManager.getLogger(RelatedContentHelper.class);

    /**
     * Cache map storing related content configurations organized by virtual host key.
     * The outer map key is the virtual host key, and the value is a pair containing:
     * - First: Map of exact term matches (term -> content)

    }

    /**
     * Reads up to len bytes from the file into the specified byte array.
     *
     * @param b the byte array to read data into
     * @param off the offset in the array at which to start storing bytes
     * @param len the maximum number of bytes to read
     * @return the number of bytes read, or -1 if end of file is reached
     * @throws SmbException if an I/O error occurs
     */

    /**
     * Logger instance for this class.
     */
    protected static final Logger logger = LogManager.getLogger(ThumbnailManager.class);

    /**
     * Base directory for storing thumbnail files.
     */
    protected File baseDir;

    /**
     * List of available thumbnail generators.
     */
    protected final List<ThumbnailGenerator> generatorList = new ArrayList<>();

    /**

    protected String queryString;

    /** Set of query terms that should be highlighted in search results. */
    protected Set<String> highlightedQuerySet = null;

    /** Map storing field names and their associated query terms for logging. */
    protected Map<String, List<String>> fieldLogMap = null;

    /** Flag indicating whether role-based query filtering should be disabled. */

   * bufferSize ≥ k, then we can ignore any elements greater than this value.
   */
  private @Nullable T threshold;

  @SuppressWarnings("unchecked") // TODO(cpovirk): Consider storing Object[] instead of T[].
  private TopKSelector(Comparator<? super T> comparator, int k) {
    this.comparator = checkNotNull(comparator, "comparator");
    this.k = k;
    checkArgument(k >= 0, "k (%s) must be >= 0", k);

Puedes configurar el parámetro del decorador de path operation `response_model_exclude_unset=True`:

{* ../../docs_src/response_model/tutorial004_py310.py hl[22] *}

y esos valores por defecto no serán incluidos en el response, solo los valores realmente establecidos.

Entonces, si envías un request a esa *path operation* para el ítem con ID `foo`, el response (no incluyendo valores por defecto) será:

```JSON
{