type HTTPRangeSpec struct {
	// Does the range spec refer to a suffix of the object?
	IsSuffixLength bool

	// Start and end offset specified in range spec
	Start, End int64
}

// GetLength - get length of range
func (h *HTTPRangeSpec) GetLength(resourceSize int64) (rangeLength int64, err error) {
	switch {
	case resourceSize < 0:
		return 0, errors.New("Resource size cannot be negative")

	case h == nil:

    public static void appendChildren(final NodeList children, final StringBuilder buf) {
        assertArgumentNotNull("children", children);
        assertArgumentNotNull("buf", buf);

        final int length = children.getLength();
        for (int i = 0; i < length; ++i) {
            appendNode(children.item(i), buf);
        }
    }

    /**
     * {@link NamedNodeMap}の文字列表現を追加します。
     *
     * @param attrs

        assertArgumentNotNull("array", array);
        assertArgument("array", array.getClass().isArray(), MessageFormatter.getSimpleMessage("ECL0104", array));

        final int length = Array.getLength(array);
        final Object[] objectArray = new Object[length];
        for (int i = 0; i < length; i++) {
            objectArray[i] = Array.get(array, i);
        }
        return objectArray;
    }

			return nil, 0, 0, err
		}
		var decSize int64
		decSize, err = oi.DecryptedSize()
		if err != nil {
			return nil, 0, 0, err
		}
		var decRangeLength int64
		decRangeLength, err = rs.GetLength(decSize)
		if err != nil {
			return nil, 0, 0, err
		}

		// We define a closure that performs decryption given
		// a reader that returns the desired range of

  }

  private fun Snapshot.assertValue(
    index: Int,
    value: String,
  ) {
    getSource(index).use { source ->
      assertThat(sourceAsString(source)).isEqualTo(value)
      assertThat(getLength(index)).isEqualTo(value.length.toLong())
    }
  }

  private fun sourceAsString(source: Source) = source.buffer().readUtf8()

  private fun Editor.assertInoperable() {

        return this;
    }

    @Override
    public MessageBuilder append(char c) {
        buffer.append(c);
        return this;
    }

    @Override
    public MessageBuilder setLength(int length) {
        buffer.setLength(length);
        return this;
    }

    @Override
    @Nonnull
    public String build() {
        return buffer.toString();
    }

    @Override
    public String toString() {

            if (arg != null) {
                buf.append(arg.getClass().getName());
            } else {
                buf.append("null");
            }
            buf.append(", ");
        }
        buf.setLength(buf.length() - 2);
        return new String(buf);
    }

    private static String getSignature(final Class<?>... paramTypes) {
        if (paramTypes == null || paramTypes.length == 0) {
            return "";

        }
        Throwable t = cause.getCause();
        while (t != null) {
            buf.append(t.getMessage()).append("], [");
            t = t.getCause();
        }
        buf.setLength(buf.length() - 4);
        return new String(buf);
    }

            return "";
        }
        final StringBuilder buffer = new StringBuilder();
        for (final Object arg : args) {
            buffer.append(arg + ", ");
        }
        buffer.setLength(buffer.length() - ", ".length());
        return new String(buffer);
    }

    /**
     * 初期化します。
     */
    protected static synchronized void initialize() {
        if (!initialized) {

        if (argTypes != null && argTypes.length > 0) {
            for (final Class<?> argType : argTypes) {
                buf.append(argType.getName()).append(", ");
            }
            buf.setLength(buf.length() - 2);
        }
        buf.append(")");
        return new String(buf);
    }

    /**
     * シグニチャの文字列表現を返します。
     *
     * @param methodName