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      1 package com.android.mail.bitmap;
      2 
      3 import android.graphics.drawable.Drawable;
      4 
      5 /**
      6  * {@link Drawable}s that support a parallax effect when drawing should
      7  * implement this interface to receive the current parallax fraction to use when
      8  * drawing.
      9  */
     10 public interface Parallaxable {
     11     /**
     12      * @param fraction the vertical center point for the viewport, in the range [0,1]
     13      */
     14     void setParallaxFraction(float fraction);
     15 }