eZ\Bundle\EzPublishCoreBundle\DependencyInjection\Configuration::addImageMagickSection PHP Method

    private function addImageMagickSection(ArrayNodeDefinition $rootNode)
    {
        $filtersInfo = <<<EOT
DEPRECATED.
This is only used for legacy injection.
You may use imagick/gmagick liip_imagine bundle drivers.

Hash of filters to be used for your image variations config.
#   Key is the filter name, value is an argument passed to "convert" binary.
#   You can use numbered placeholders (aka input variables) that will be replaced by defined parameters in your image variations config
EOT;
        $rootNode->children()->arrayNode('imagemagick')->info('ImageMagick configuration')->children()->booleanNode('enabled')->defaultTrue()->end()->scalarNode('path')->info('Absolute path of ImageMagick / GraphicsMagick "convert" binary.')->beforeNormalization()->ifTrue(function ($v) {
            $basename = basename($v);
            // If there is a space in the basename, just drop it and everything after it.
            if (($wsPos = strpos($basename, ' ')) !== false) {
                $basename = substr($basename, 0, $wsPos);
            }
            return !is_executable(dirname($v) . DIRECTORY_SEPARATOR . $basename);
        })->thenInvalid('Please provide full path to ImageMagick / GraphicsMagick  "convert" binary. Please also check that it is executable.')->end()->end()->arrayNode('filters')->info($filtersInfo)->example(array('geometry/scaledownonly' => '"-geometry {1}x{2}>"'))->prototype('scalar')->end()->end()->end()->end()->end();
    }