if err != nil {
		return fmt.Errorf("failed to find 'lo' link: %v", err)
	}

	// Set up netlink routes for localhost
	cidrs := []string{"0.0.0.0/0"}
	if cfg.EnableIPv6 {
		// IPv6 may be enabled, but only partially
		v, err := ReadSysctl(ipv6DisabledLo)
		if v != "1" {
			// If we got an error, we will proceed. Maybe it will work anyways
			if err != nil {

    /**
     * Returns {@code true} if the value has been partially collected, meaning that the value is
     * null.
     */
    static <K, V, E extends InternalEntry<K, V, E>> boolean isCollected(E entry) {
      return entry.getValue() == null;
    }

    /**
     * Gets the value from an entry. Returns {@code null} if the entry is invalid or
     * partially-collected.
     */
    @CheckForNull

## Partial updates with `PATCH`

You can also use the <a href="https://developer.mozilla.org/en-US/docs/Web/HTTP/Methods/PATCH" class="external-link" target="_blank">HTTP `PATCH`</a> operation to *partially* update data.

This means that you can send only the data that you want to update, leaving the rest intact.

/// note

`PATCH` is less commonly used and known than `PUT`.

    /**
     * Returns {@code true} if the value has been partially collected, meaning that the value is
     * null.
     */
    static <K, V, E extends InternalEntry<K, V, E>> boolean isCollected(E entry) {
      return entry.getValue() == null;
    }

    /**
     * Gets the value from an entry. Returns {@code null} if the entry is invalid or
     * partially-collected.
     */
    @CheckForNull

   *     {@code get()} throws a different kind of exception, that exception itself.
   * @param executor the executor that runs {@code fallback} if the input fails
   */
  @J2ktIncompatible
  @Partially.GwtIncompatible("AVAILABLE but requires exceptionType to be Throwable.class")
  public final <X extends Throwable> FluentFuture<V> catching(
      Class<X> exceptionType, Function<? super X, ? extends V> fallback, Executor executor) {

func (fi headerFileInfo) Info() (fs.FileInfo, error) { return fi, nil }

func (fi headerFileInfo) String() string {
	return fs.FormatFileInfo(fi)
}

// FileInfoHeader creates a partially-populated [FileHeader] from an
// fs.FileInfo.
// Because fs.FileInfo's Name method returns only the base name of
// the file it describes, it may be necessary to modify the Name field

		b := NewWriterSize(tw, BufSize)
		b.WriteString("1234")
		tw.check(t, "", "")
		b.WriteString("56789012")   // longer than BufSize
		tw.check(t, "12345678", "") // but not enough (after filling the partially-filled buffer)
		b.Flush()
		tw.check(t, "123456789012", "")
	}
	{
		tw := &teststringwriter{}
		b := NewWriterSize(tw, BufSize)
		b.WriteString("123456789")   // long string, empty buffer:

#### PushContext

`PushContext` is an immutable snapshot of the current state of the world. It is regenerated (usually partially) on each configuration push (more on this below). Due to being a snapshot, most lookups are lock-free.

   *     {@code get()} throws a different kind of exception, that exception itself.
   * @param executor the executor that runs {@code fallback} if {@code input} fails
   * @since 19.0
   */
  @J2ktIncompatible
  @Partially.GwtIncompatible("AVAILABLE but requires exceptionType to be Throwable.class")
  public static <V extends @Nullable Object, X extends Throwable> ListenableFuture<V> catching(
      ListenableFuture<? extends V> input,

   * be made {@code static} and its instances can be safely constructed and added in the {@link
   * ServiceManager} constructor without having to close over the partially constructed {@link
   * ServiceManager} instance (i.e. avoid leaking a pointer to {@code this}).
   */
  private final ServiceManagerState state;

  private final ImmutableList<Service> services;

  /**