public void addFill() {
        middle = FILL;
        cssValue = cssValue.replace(FILL, "").concat(" ").concat(FILL);
        if (getStateChangeInformer() != null) {
            getStateChangeInformer().stateChanged(this);
        }
    }
public void addFill() {
        middle = FILL;
        cssValue = cssValue.replace(FILL, "").concat(" ").concat(FILL);
        if (getStateChangeInformer() != null) {
            getStateChangeInformer().stateChanged(this);
        }
    }
public void addFill ( ) { middle = FILL ; cssValue = cssValue . replace ( FILL , "" ) . concat ( " " ) . concat ( FILL ) ; if ( getStateChangeInformer ( ) != null ) { getStateChangeInformer ( ) . stateChanged ( this ) ; } }
adds the value {@code fill} in cssValue.

@since 1.0.0
@author WFF
adds the value { @code fill } in cssValue .