protected function requireFrontend() {
		$extension = Director::isLive() ? '.min' : '';
		$cssFiles = array(
			CROPPERFIELD_PATH . '/cropper/cropper' . $extension . '.css',
			CROPPERFIELD_PATH . '/cropper/CropperField.css',
		);
		$jsFiles = array(
			CROPPERFIELD_PATH . '/cropper/cropper' . $extension . '.js',
			CROPPERFIELD_PATH . '/cropper/CropperField.js',
		);
		Requirements::combine_files('cropperfield-all.css', $cssFiles);
		Requirements::combine_files('cropperfield-all.js', $jsFiles);
	}