@Override
    public void setTintMode(PorterDuff.Mode tintMode) {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
            mFront.setTintMode(tintMode);
            mBack.setTintMode(tintMode);
        }
    }
Returns whether flipping is in progress.
android/modules/module_common/src/main/java/github/tornaco/android/thanos/widget/checkable/FlipDrawable.java