void setPrefferedWidth(int prefferedWidth) {
    int oldValue = this.prefferedWidth;
    if (oldValue != prefferedWidth) {
      this.prefferedWidth = prefferedWidth;
      propertyChangeSupport.firePropertyChange(ATTR_PREFFERED_WIDTH, oldValue, this.prefferedWidth);
    }
  }
void setPrefferedWidth(int prefferedWidth)