private void UpdatePictureBoxes()
        {
            Image currentLockImage = GetImageForCheckState(_watchVarWrapper.GetLockedCheckState(FixedAddressList));
            bool  isLocked         = currentLockImage != null;
            bool  isFixedAddress   = FixedAddressList != null;

            if (_lockPictureBox.Image == currentLockImage &&
                _lockPictureBox.Visible == isLocked &&
                _pinPictureBox.Visible == isFixedAddress)
            {
                return;
            }

            _lockPictureBox.Image   = currentLockImage;
            _lockPictureBox.Visible = isLocked;
            _pinPictureBox.Visible  = isFixedAddress;

            int pinPadding = isLocked ? PIN_INNER_PADDING : PIN_OUTER_PADDING;

            _pinPictureBox.Location =
                new Point(
                    _variableNameWidth - pinPadding,
                    _pinPictureBox.Location.Y);
        }