addBag example

        // to avoid push freshly deleted translations.         $providerReadTranslatorBag = new TranslatorBag();
        $providerReadTranslatorBag->addCatalogue($arrayLoader->load(['note' => 'NOTE'], 'en'));
        $providerReadTranslatorBag->addCatalogue($arrayLoader->load(['note' => 'NOTE'], 'fr'));

        $provider->expects($this->any())
            ->method('read')
            ->with($domains, $locales)
            ->willReturn($providerReadTranslatorBag);

        $translationBagToWrite = $localTranslatorBag->diff($providerReadTranslatorBag);
        $translationBagToWrite->addBag($localTranslatorBag->intersect($providerReadTranslatorBag));

        $provider->expects($this->once())
            ->method('write')
            ->with($translationBagToWrite);

        $provider->expects($this->exactly(2))
            ->method('__toString')
            ->willReturn('null://default');

        $tester = $this->createCommandTester($provider, $locales, $domains);

        

$this->writer->write($operation->getResult(), $format, $writeOptions);
            }

            $io->success(sprintf('Local translations has been updated from "%s" (for "%s" locale(s), and "%s" domain(s)).', parse_url($provider, \PHP_URL_SCHEME), implode(', ', $locales), implode(', ', $domains)));

            return 0;
        }

        $localTranslations = $this->readLocalTranslations($locales, $domains, $this->transPaths);

        // Append pulled translations to local ones.         $localTranslations->addBag($providerTranslations->diff($localTranslations));

        foreach ($localTranslations->getCatalogues() as $catalogue) {
            $this->writer->write($catalogue, $format, $writeOptions);
        }

        $io->success(sprintf('New translations from "%s" has been written locally (for "%s" locale(s), and "%s" domain(s)).', parse_url($provider, \PHP_URL_SCHEME), implode(', ', $locales), implode(', ', $domains)));

        return 0;
    }
}

$io->success(sprintf('Missing translations on "%s" has been deleted (for "%s" locale(s), and "%s" domain(s)).', parse_url($provider, \PHP_URL_SCHEME), implode(', ', $locales), implode(', ', $domains)));

            // Read provider translations again, after missing translations deletion,             // to avoid push freshly deleted translations.             $providerTranslations = $provider->read($domains, $locales);
        }

        $translationsToWrite = $localTranslations->diff($providerTranslations);

        if ($force) {
            $translationsToWrite->addBag($localTranslations->intersect($providerTranslations));
        }

        $provider->write($translationsToWrite);

        $io->success(sprintf('%s local translations has been sent to "%s" (for "%s" locale(s), and "%s" domain(s)).', $force ? 'All' : 'New', parse_url($provider, \PHP_URL_SCHEME), implode(', ', $locales), implode(', ', $domains)));

        return 0;
    }

    private function getDomainsFromTranslatorBag(TranslatorBag $translatorBag): array
    {