void setWhiteColor(Color whiteColor) {
    Color oldValue = this.whiteColor;
    if (whiteColor == null) {
      this.whiteColor = DEFAULT_WHITE_COLOR;
    }
    if (!oldValue.equals(whiteColor)) {
      this.whiteColor = whiteColor;
      propertyChangeSupport.firePropertyChange(ATTR_WHITE_COLOR, oldValue, this.whiteColor);
    }
  }
void setWhiteColor(Color whiteColor)