systemProperty 'javax.net.ssl.keyStoreType', 'BCFKS'
          systemProperty 'org.bouncycastle.fips.approved_only', 'true'
          // Setting security explicitly off as a default behavior for the tests which normally run
          // with no x-pack. Tests having security explicitly enabled/disabled will override this setting
          setting 'xpack.security.enabled', 'false'
          setting 'xpack.security.fips_mode.enabled', 'true'

#                     ; groupComment=[comment]
#                     ; elementList=list:{[the list of classification element's name]}
#                 }
#             }
#         }
#         # classification elements for implicit classification
#         ; map:{
#             ; code=[code]; name=[name]; alias=[alias]; comment=[comment]
#             ; sisterCode=[code or code-list]; subItemMap=map:{[free-map]}
#         }

Je pense que `Union[SomeType, None]` est plus explicite quant à sa signification.

Il ne s'agit que des mots et des noms. Mais ces mots peuvent influencer la manière dont vous et vos coéquipiers pensez au code.

À titre d'exemple, prenons cette fonction :

```python

            ? projectLayout.files(coreFileTree, xpackFileTree)
            : projectLayout.files(coreFileTree, xpackFileTree, additionalConfigToFileTree.apply(additionalConfig));

        // copy tests only if explicitly requested
        return includeCore.get().isEmpty() == false || includeXpack.get().isEmpty() == false || additionalConfig != null
            ? fileCollection.getAsFileTree()
            : null;
    }

            String taskname = destructiveDistroTestTaskName(distribution);
            TaskProvider<?> depsTask = project.getTasks().register(taskname + "#deps");
            // explicitly depend on the archive not on the implicit extracted distribution
            depsTask.configure(t -> t.dependsOn(distribution.getArchiveDependencies()));
            depsTasks.put(taskname, depsTask);

 * if there are any Rest YAML tests present in source, or copied from {@link CopyRestTestsTask} output. X-pack specs must be explicitly
 * declared to be copied.
 * <br>
 * <i>For example:</i>
 * <pre>
 * restResources {
 *   restApi {
 *     includeXpack 'enrich'
 *   }
 * }
 * </pre>

   *
   * <p>As discussed above, prefer to use the method reference {@code Object::toString} instead,
   * though note that it is not serializable unless you explicitly make it {@link Serializable},
   * typically by writing {@code (Function<Object, String> & Serializable) Object::toString}.
   *
   * <p>For more important information about the transition from Guava's {@link Function} class to

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

java.io.ObjectOutput
java.io.ObjectInputStream
java.io.ObjectInput

java.nio.file.Files#isHidden(java.nio.file.Path) @ Dependent on the operating system, use FileSystemUtils.isHidden instead

@defaultMessage Resolve hosts explicitly to the address(es) you want with InetAddress.
java.net.InetSocketAddress#<init>(java.lang.String,int)
java.net.Socket#<init>(java.lang.String,int)
java.net.Socket#<init>(java.lang.String,int,java.net.InetAddress,int)

  // The next two tests verify that map entries are not accessed after they're
  // removed, since IdentityHashMap throws an exception when that occurs.
  @SuppressWarnings("IdentityHashMapBoxing") // explicitly testing IdentityHashMap
  public void testIdentityKeySetIteratorRemove() {
    BiMap<Integer, String> bimap =
        new AbstractBiMap<Integer, String>(