this.valueComparator = checkNotNull(valueComparator, "valueComparator");
      return this;
    }

    @CanIgnoreReturnValue
    Builder<K, V> combine(Builder<K, V> other) {
      checkNotNull(other);
      entries.addAll(other.entries);
      return this;
    }

    public ImmutableMap<K, V> build() {
      return buildOrThrow();
    }

    public Builder<K, V> orderValuesBy(Comparator<? super V> valueComparator) {
      this.valueComparator = checkNotNull(valueComparator);
      return this;
    }

    @CanIgnoreReturnValue
    Builder<K, V> combine(Builder<K, V> other) {
      for (Map.Entry<K, Collection<V>> entry : other.builderMap.entrySet()) {
        putAll(entry.getKey(), entry.getValue());
      }
      return this;
    }

When the `with` block finishes, it makes sure to close the file, even if there were exceptions.

When you create a dependency with `yield`, **FastAPI** will internally create a context manager for it, and combine it with some other related tools.

### Using context managers in dependencies with `yield`

!!! warning
    This is, more or less, an "advanced" idea.

    public Builder<E> addAll(Iterator<? extends E> elements) {
      super.addAll(elements);
      return this;
    }

    @CanIgnoreReturnValue
    @Override
    Builder<E> combine(ImmutableSet.Builder<E> builder) {
      super.combine(builder);
      return this;
    }

    /**
     * Returns a newly-created {@code ImmutableSortedSet} based on the contents of the {@code
     * Builder} and its comparator.

    public Builder<K, V> orderValuesBy(Comparator<? super V> valueComparator) {
      this.valueComparator = checkNotNull(valueComparator);
      return this;
    }

    @CanIgnoreReturnValue
    Builder<K, V> combine(Builder<K, V> other) {
      for (Map.Entry<K, Collection<V>> entry : other.builderMap.entrySet()) {
        putAll(entry.getKey(), entry.getValue());
      }
      return this;
    }

private static final Xpp3Dom[] EMPTY_DOM_ARRAY; public static final String CHILDREN_COMBINATION_MODE_ATTRIBUTE = combine.children; public static final String CHILDREN_COMBINATION_MERGE = merge; public static final String CHILDREN_COMBINATION_APPEND = append; public static final String DEFAULT_CHILDREN_COMBINATION_MODE = merge; public static final String SELF_COMBINATION_MODE_ATTRIBUTE = combine.self; public static final String SELF_COMBINATION_OVERRIDE = override; public static final String SELF_COMBINATION_MERGE...

  // Try to combine these values into a single parallel tensor.
  std::array<TFE_TensorHandle*, 2> components{size_two.get(), size_three.get()};
  TensorHandlePtr combined_value = CreatePerDeviceValues(
      context.get(), components, device_name, status.get());
  ASSERT_EQ(TF_GetCode(status.get()), TF_OK) << TF_Message(status.get());
  int num_axes = TFE_TensorHandleNumDims(combined_value.get(), status.get());

  # Find all Python py_test targets not tagged "no_pip" or "manual", excluding
  # any targets in ignored packages. Combine this list of targets into a bazel
  # query list (e.g. the list becomes "target+target2+target3")

	gwMsg, err := checkGatewayAPIs(cli)
	if err != nil {
		return nil, err
	}
	msgs = append(msgs, gwMsg...)

	// TODO: add more checks

	sa := local.NewSourceAnalyzer(
		analysis.Combine("upgrade precheck", &maturity.AlphaAnalyzer{}),
		resource.Namespace(ctx.Namespace()),
		resource.Namespace(ctx.IstioNamespace()),
		nil,
	)
	if err != nil {
		return nil, err
	}

            or {@code combine.self} attributes to the children of the configuration element:</p>
            <ul>
            <li>{@code combine.children}: available values are {@code merge} (default) and {@code append},</li>
            <li>{@code combine.self}: available values are {@code merge} (default) and {@code override}.</li>