private function applyFocus(ImageInterface $image, FileVersion $fileVersion, array $scale)
    {
        return $this->modifyAllLayers(
            $image,
            function(ImageInterface $layer) use ($fileVersion, $scale) {
                return $this->focus->focus(
                    $layer,
                    $fileVersion->getFocusPointX(),
                    $fileVersion->getFocusPointY(),
                    $scale['x'],
                    $scale['y']
                );
            }
        );
    }