gistfile1.txt

        $formMapper->get("menuVisibility")
            ->addModelTransformer(new CallbackTransformer(
                function ($bitmarkToList) {
                    $options = [0b1, 0b10, 0b100];
                    for($i = 0; $i < count($options); $i++){
                        $options[$i] = $options[$i] & $bitmarkToList;
                    }
                    return $options;
                },
                function ($listToBitMask) {
                    $res = array_pop($listToBitMask);
                    foreach($listToBitMask as $l){
                        $res = $res | $l;
                    }

                    return $res;
                }
        ));