public boolean getSideShown() {
        final float totalDurationMs = mPreFlipDurationMs + mFlipDurationMs + mPostFlipDurationMs;
        final float middleFraction = (mPreFlipDurationMs / totalDurationMs
                + (totalDurationMs - mPostFlipDurationMs) / totalDurationMs) / 2;
        return mFlipFraction / 2 < middleFraction;
    }
Returns true if the front is shown. Returns false if the back is shown.
android/modules/module_common/src/main/java/github/tornaco/android/thanos/widget/checkable/FlipDrawable.java