public void setBackGround(String backGround) {
   if (!Faces.isNullOrEmpty(backGround)) {
     this.backGround = backGround;
   }
 }
 public void setForeGround(String foreGround) {
   if (!Faces.isNullOrEmpty(foreGround)) {
     this.foreGround = foreGround;
   }
 }