String[] prefix = {"f", "g"};
      String[] suffix = {"h", "i"};

      String[] all = new String[2 + elements.length + 2];
      System.arraycopy(prefix, 0, all, 0, 2);
      System.arraycopy(elements, 0, all, 2, elements.length);
      System.arraycopy(suffix, 0, all, 2 + elements.length, 2);

      return ImmutableList.copyOf(all).subList(2, elements.length + 2);
    }
  }

    return SampleElements.mapEntries(keys, values);
  }

  @Override
  public Set<Entry<K, V>> create(Object... elements) {
    Entry<K, V>[] entries = createArray(elements.length);
    System.arraycopy(elements, 0, entries, 0, elements.length);
    return createFromEntries(entries);
  }

  public abstract Set<Entry<K, V>> createFromEntries(Entry<K, V>[] entries);

  @Override

    return Arrays.asList(contents).iterator();
  }

  @Override
  public @Nullable Object[] toArray() {
    @Nullable Object[] result = new @Nullable Object[contents.length];
    System.arraycopy(contents, 0, result, 0, contents.length);
    return result;
  }

  /*
   * a "type A" unmodifiable collection freaks out proactively, even if there
   * wasn't going to be any actual work to do anyway

            @Override
            protected void finalize() {
              try {
                reset();
              } catch (Throwable t) {
                t.printStackTrace(System.err);
              }
            }
          };
    } else {
      source =
          new ByteSource() {
            @Override
            public InputStream openStream() throws IOException {

  int internalArrayStart() {
    return 0;
  }

  @Override
  int internalArrayEnd() {
    return size;
  }

  @Override
  int copyIntoArray(@Nullable Object[] dst, int offset) {
    System.arraycopy(elements, 0, dst, offset, size);
    return offset + size;
  }

  @Override
  ImmutableList<E> createAsList() {
    return ImmutableList.asImmutableList(elements, size);
  }

  @Override

    return SampleElements.mapEntries(keys, values);
  }

  @Override
  public Set<Entry<K, V>> create(Object... elements) {
    Entry<K, V>[] entries = createArray(elements.length);
    System.arraycopy(elements, 0, entries, 0, elements.length);
    return createFromEntries(entries);
  }

  public abstract Set<Entry<K, V>> createFromEntries(Entry<K, V>[] entries);

  @Override

   * - https://github.com/jspecify/jspecify/issues/65
   *
   * - https://github.com/jspecify/jdk/commit/71d826792b8c7ef95d492c50a274deab938f2552
   */
  /*
   * TODO(cpovirk): Is the unchecked cast avoidable? Would System.arraycopy be similarly fast (if
   * likewise not type-checked)? Could our single caller do something different?
   */
  @SuppressWarnings({"nullness", "unchecked"})

       *
       * In the future, the use of Unsafe.getLong() should be replaced by ByteBuffer.getLong(),
       * which will have an efficient native implementation in JDK 9.
       *
       */
      String arch = System.getProperty("os.arch");
      if ("amd64".equals(arch)) {
        theGetter =
            ByteOrder.nativeOrder().equals(ByteOrder.LITTLE_ENDIAN)
                ? UnsafeByteArray.UNSAFE_LITTLE_ENDIAN

    return Arrays.asList(contents).iterator();
  }

  @Override
  public @Nullable Object[] toArray() {
    @Nullable Object[] result = new @Nullable Object[contents.length];
    System.arraycopy(contents, 0, result, 0, contents.length);
    return result;
  }

  /*
   * a "type A" unmodifiable collection freaks out proactively, even if there
   * wasn't going to be any actual work to do anyway

      String[] prefix = {"f", "g"};
      String[] suffix = {"h", "i"};

      String[] all = new String[2 + elements.length + 2];
      System.arraycopy(prefix, 0, all, 0, 2);
      System.arraycopy(elements, 0, all, 2, elements.length);
      System.arraycopy(suffix, 0, all, 2 + elements.length, 2);

      return ImmutableList.copyOf(all).subList(2, elements.length + 2);
    }
  }