if (collection instanceof NavigableSet) {
      return new WrappedNavigableSet(key, (NavigableSet<V>) collection, null);
    } else {
      return new WrappedSortedSet(key, (SortedSet<V>) collection, null);
    }
  }

  // Following Javadoc copied from Multimap and SortedSetMultimap.

  /**

import java.util.Map;
import org.jspecify.annotations.Nullable;

/**
 * A {@code BiMap} backed by an {@code EnumMap} instance for keys-to-values, and a {@code HashMap}
 * instance for values-to-keys. Null keys are not permitted, but null values are. An {@code
 * EnumHashBiMap} and its inverse are both serializable.
 *
 * <p>See the Guava User Guide article on <a href=

        assertEquals(16, md5Hash.length);
    }

    @Test
    @DisplayName("Should handle null input gracefully")
    void testNullInputHandling() {
        // When/Then
        assertThrows(NullPointerException.class, () -> {
            MessageDigest md4 = Crypto.getMD4();
            md4.digest(null);
        });

        assertThrows(NullPointerException.class, () -> {

<div class="screenshot">
<img src="/img/tutorial/separate-openapi-schemas/image02.png">
</div>

Das bedeutet, dass es **immer einen Wert** hat, der Wert kann jedoch manchmal `None` sein (oder `null` in JSON).

<div class="screenshot">
<img src="/img/tutorial/separate-openapi-schemas/image02.png">
</div>

Это означает, что у него **всегда будет какое‑то значение**, просто иногда это значение может быть `None` (или `null` в JSON).

                                "in": "query",
                                "required": False,
                                "schema": {
                                    "anyOf": [{"type": "string"}, {"type": "null"}],
                                    "examples": [
                                        "json_schema_query1",
                                        "json_schema_query2",
                                    ],

                    // accessibility controls here.
                    f.setAccessible(true);
                    f.set(null, null);
                } catch (IllegalAccessException e) {
                    throw new RuntimeException(e);
                }
            });
        }

        }

        //   required check
        final Object urlObj = dataMap.get(fessConfig.getIndexFieldUrl());
        if (urlObj == null) {
            final Object configId = dataMap.get(fessConfig.getIndexFieldConfigId());
            throw new DataStoreException("URL field is null in dataMap. Cannot index document without a URL. configId: " + configId);
        }

            return true;
        }

        // Some socket errors might be recoverable
        if (error instanceof SocketException) {
            String message = error.getMessage();
            if (message != null) {
                message = message.toLowerCase();
                // Connection reset, network unreachable, etc. might be temporary

        @Test
        @DisplayName("null handle throws NPE")
        void nullHandle() {
            assertThrows(NullPointerException.class, () -> new SmbPipeInputStream(null, tree));
        }

        @Test
        @DisplayName("null tree throws NPE")
        void nullTree() {
            assertThrows(NullPointerException.class, () -> new SmbPipeInputStream(handle, null));
        }
    }