*/
  public static <R, C, V> Table<R, C, V> newCustomTable(
      Map<R, Map<C, V>> backingMap, Supplier<? extends Map<C, V>> factory) {
    checkArgument(backingMap.isEmpty());
    checkNotNull(factory);
    // TODO(jlevy): Wrap factory to validate that the supplied maps are empty?
    return new StandardTable<>(backingMap, factory);
  }

  /**

```

</div>

Then go to the `/docs` UI, you will see that **FastAPI** is using these **models** to **document** the API, and it will use them to **serialize** and **validate** the data too.

<div class="screenshot">
<img src="/img/tutorial/sql-databases/image01.png">
</div>

## Update the App with Multiple Models { #update-the-app-with-multiple-models }

        @Override
        public V setValue(V value) {
          return super.setValue(checkNotNull(value));
        }

        @Override
        public boolean equals(@Nullable Object object) {
          // TODO(lowasser): identify why this affects GWT tests
          return standardEquals(object);
        }
      };
    }
  }

  /**
   * {@inheritDoc}
   *

      @Override
      protected Iterator<Integer> newTargetIterator() {
        return Iterators.forArray(1, 2, 3);
      }
    }.test();
  }

  /*
   * TODO(cpovirk): Test forArray with ListIteratorTester (not just IteratorTester), including with
   * a start position other than 0.
   */

  public void testForEnumerationEmpty() {

      synchronized (mutex) {
        return delegate().computeIfAbsent(key, mappingFunction);
      }
    }

    @SuppressWarnings("nullness") // TODO: b/423853632 - Remove after checker is fixed.
    @Override
    public @Nullable V computeIfPresent(
        K key, BiFunction<? super K, ? super @NonNull V, ? extends @Nullable V> remappingFunction) {

   *
   * <p>See {@link #checkArgument(boolean, String, Object...)} for details.
   *
   * @since 20.0 (varargs overload since 2.0)
   */
  public static void checkArgument(
      boolean expression,
      // TODO: cl/604933487 - Make errorMessageTemplate consistently @Nullable across overloads.
      @Nullable String errorMessageTemplate,
      @Nullable Object p1,
      @Nullable Object p2) {
    if (!expression) {

			objectName:     "foxdir/fooobject/foo.txt",
			objectModTime:  time.Now().UTC().Add(-10 * 24 * time.Hour), // Created 10 days ago
			expectedAction: DeleteAction,
		},
		// Too early to remove (test Days)
		{
			inputConfig:    `<LifecycleConfiguration><Rule><Filter><Prefix>foodir/</Prefix></Filter><Status>Enabled</Status><Expiration><Days>5</Days></Expiration></Rule></LifecycleConfiguration>`,

                skippedFilesWithTestAndReason.put(file, testWithReason);
            }
        });

        RestTestTransformer transformer = new RestTestTransformer();
        // TODO: instead of flattening the FileTree here leverage FileTree.visit() so we can preserve folder hierarchy in a more robust way
        for (File file : getTestFiles().getFiles()) {

      @Override
      protected Iterator<Integer> newTargetIterator() {
        return Iterators.forArray(1, 2, 3);
      }
    }.test();
  }

  /*
   * TODO(cpovirk): Test forArray with ListIteratorTester (not just IteratorTester), including with
   * a start position other than 0.
   */

  public void testForEnumerationEmpty() {

     * that can lead to NullPointerException. That's unfortunate. But hopefully most Kotlin callers
     * use `get(key) ?: defaultValue` instead of this method, anyway.
     */
    V result = get(key);
    // TODO(b/192579700): Use a ternary once it no longer confuses our nullness checker.
    if (result != null) {
      return result;
    } else {
      return defaultValue;
    }
  }