$filemodifications->bw()
Converts the image to black and white
$filemodifications->bw(): Kirby\Cms\FileVersion|Kirby\Cms\File|Kirby\Filesystem\Asset
Return type
Kirby\Cms\FileVersion
|Kirby\Cms\File
|Kirby\Filesystem\Asset
Parent class
Kirby\Cms\FileModifications