Plugins use internal undocumented API and features of Unlayer.
content:added
content:removed
content:modified
row:added
row:removed
Unlayer::make('Content', 'design')->config(function (): array {
/** @see https://docs.unlayer.com/docs/email-builder */
return $this->generateUnlayerConfig();
})->plugins([
asset(mix('js/unlayer-editor-plugins/utm.js')->toHtml()),
asset(mix('js/unlayer-editor-plugins/fontsize.js')->toHtml()),
]);