protected function _error($messageKey, $value = null) { if ($messageKey === static::NOT_IN_ARRAY) { $matches = StringHelper::findSimilar($this->_value, $this->_haystack); if (empty($matches)) { $this->_messages[$messageKey] = sprintf(t('"%s" is not in the list of allowed values.'), $this->_value); } else { $this->_messages[$messageKey] = sprintf(t('"%s" is not in the list of allowed values. Did you mean one of the following?: %s'), $this->_value, implode(', ', $matches)); } } else { parent::_error($messageKey, $value); } }