public function normalize($input, $property, model_editor $editor)
{
$input = parent::normalize($input, $property, $editor);
if ($input !== null) {
$junctor = $this->separator[0];
$items = preg_split('/[' . preg_quote($this->separator) . ']/', $input);
$items = array_map(function ($n) {
return trim($n);
}, $items);
$items = array_filter($items, function ($n) {
return $n !== '';
});
$input = implode("{$junctor} ", $items);
}
return $input;
}
