public void reset() {
        final float old = mFlipFraction;
        mFlipAnimator.cancel();
        mFlipFraction = mFlipToSide ? 0f : 2f;
        if (mFlipFraction != old) {
            invalidateSelf();
        }
    }
Stop animating the flip and reset to one side.
android/modules/module_common/src/main/java/github/tornaco/android/thanos/widget/checkable/FlipDrawable.java