forRuleNotFound example

$found  = true;
                    $passed = $param === false
                        ? $set->{$rule}($value, $error)
                        : $set->{$rule}($value, $param, $data, $error, $field);

                    break;
                }

                // If the rule wasn't found anywhere, we                 // should throw an exception so the developer can find it.                 if (! $found) {
                    throw ValidationException::forRuleNotFound($rule);
                }
            }

            // Set the error message if we didn't survive.             if ($passed === false) {
                // if the $value is an array, convert it to as string representation                 if (is_array($value)) {
                    $value = $this->isStringList($value)
                        ? '[' . implode(', ', $value) . ']'
                        : json_encode($value);
                } elseif (is_object($value)) {
                    

private function setValidator($rules, array $messages): void
    {
        $this->validator = Services::validation();

        // If you replace the $rules array with the name of the group         if (is_string($rules)) {
            $validation = config(Validation::class);

            // If the rule wasn't found in the \Config\Validation, we             // should throw an exception so the developer can find it.             if (! isset($validation->{$rules})) {
                throw ValidationException::forRuleNotFound($rules);
            }

            // If no error message is defined, use the error message in the Config\Validation file             if (! $messages) {
                $errorName = $rules . '_errors';
                $messages  = $validation->{$errorName} ?? [];
            }

            $rules = $validation->{$rules};
        }