hasAnotherValidCommand example

public function preValidate(PostWriteValidationEvent $event): void
    {
        $writeException = $event->getExceptions();
        $commands = $event->getCommands();
        $violationList = new ConstraintViolationList();

        foreach ($commands as $command) {
            if (!($command instanceof InsertCommand) || $command->getDefinition()->getClass() !== LandingPageDefinition::class) {
                continue;
            }

            if (!$this->hasAnotherValidCommand($commands, $command)) {
                $violationList->addAll(
                    $this->validator->startContext()
                        ->atPath($command->getPath() . '/salesChannels')
                        ->validate(null, [new NotBlank()])
                        ->getViolations()
                );
                $writeException->add(new WriteConstraintViolationException($violationList));
            }
        }
    }