library/src/main/java/com/mikepenz/crossfadedrawerlayout/view/CrossfadeDrawerLayout.java
public void fadeDown(int duration) {
        //fade down
        mContainer.clearAnimation();
        ResizeWidthAnimation anim = new ResizeWidthAnimation(mContainer, mMinWidth, new ApplyTransformationListener() {
            @Override
            public void applyTransformation(int width) {
                overlapViews(width);
            }
        });
        anim.setDuration(duration);
        mContainer.startAnimation(anim);
    }
public void fadeDown(int duration) {
        //fade down
        mContainer.clearAnimation();
        ResizeWidthAnimation anim = new ResizeWidthAnimation(mContainer, mMinWidth, new ApplyTransformationListener() {
            @Override
            public void applyTransformation(int width) {
                overlapViews(width);
            }
        });
        anim.setDuration(duration);
        mContainer.startAnimation(anim);
    }
animate to the small view

@param duration