Por que estou recebendo um aviso dizendo:

The field testscreen.ScaleAnimToShow.mVanishAfter is never read locally testscreen.java /testscreen/src/com/testscreen  line 186    Java Problem

do seguinte código?

public class ScaleAnimToShow extends ScaleAnimation{
       private View mView;
       private LayoutParams mLayoutParams;
       private int mMarginBottomFromY, mMarginBottomToY;
       private boolean mVanishAfter = false;

       public ScaleAnimToShow(float toX, float fromX, float toY, float fromY, int duration, View view,boolean vanishAfter){
           super(fromX, toX, fromY, toY);
           openLayout = view;
           setDuration(duration);
           mView = view;
           mVanishAfter = vanishAfter;
           mLayoutParams = (LayoutParams) view.getLayoutParams();
           mView.setVisibility(View.VISIBLE);
           int height = mView.getHeight();
           //mMarginBottomFromY = (int) (height * fromY) + mLayoutParams.bottomMargin + height;
           //mMarginBottomToY = (int) (0 - ((height * toY) + mLayoutParams.bottomMargin)) + height;
           mMarginBottomFromY = 0;
           mMarginBottomToY = height;
           Log.v("CZ",".................height..." + height + " , mMarginBottomFromY...." + mMarginBottomFromY  + " , mMarginBottomToY.." +mMarginBottomToY);
       }