PromptBuilder::normalizePreferenceIdentifier( mixed $value, string $emptyMessage = 'Model preference identifiers cannot be empty.' ): string

1265    private function normalizePreferenceIdentifier($value, string $emptyMessage = 'Model preference identifiers cannot be empty.'): string1266    {1267        if (!is_string($value)) {1268            throw new InvalidArgumentException($emptyMessage);1269        }1270        $trimmed = trim($value);1271        if ($trimmed === '') {1272            throw new InvalidArgumentException($emptyMessage);1273        }1274        return $trimmed;1275    }