$file->grayscale()
Alias for File::bw()
$file->grayscale(): Kirby\Cms\FileVersion|Kirby\Cms\File|Kirby\Filesystem\AssetReturn types
Kirby\Cms\FileVersionorKirby\Cms\FileorKirby\Filesystem\Asset
This method modifies the existing $file object it is applied to and returns it again.