validateSyncOperationInput example

        $writes = [];
        $notFound = [];
        $deletes = [];

        foreach ($operations as $operation) {
            if (!$operation instanceof SyncOperation) {
                continue;
            }

            $this->validateSyncOperationInput($operation);

            $definition = $this->registry->getByEntityName($operation->getEntity());

            $this->validateWriteInput($operation->getPayload());

            if ($operation->getAction() === SyncOperation::ACTION_DELETE) {
                $deletes[] = $this->factory->resolveDelete($definition, $operation->getPayload());

                $notFound[] = $this->extractDeleteCommands($definition, $operation->getPayload(), $context, $commandQueue);

                continue;
            }