Issue #3368808: Override Composer Stager's TranslatableFactory to return Drupal's TranslatableMarkup

package_manager/src/TranslatableStringAdapter.php

+<?php
+
+declare(strict_types = 1);
+
+namespace Drupal\package_manager;
+
+use Drupal\Core\StringTranslation\TranslatableMarkup;
+use PhpTuf\ComposerStager\API\Translation\Service\TranslatorInterface;
+use PhpTuf\ComposerStager\API\Translation\Value\TranslatableInterface;
+use PhpTuf\ComposerStager\API\Translation\Value\TranslationParametersInterface;
+
+/**
+ * An adapter for interoperable string translation.
+ *
+ * This class is designed to adapt Drupal's style of string translation so it
+ * can be used with the Symfony-inspired architecture used by Composer Stager.
+ */
+final class TranslatableStringAdapter extends TranslatableMarkup implements TranslatableInterface, TranslationParametersInterface {
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getAll(): array {
+    return $this->getArguments();
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function trans(TranslatorInterface $translator, ?string $locale = NULL): string {
+    return $translator->trans(
+      $this->getUntranslatedString(),
+      $this,
+      $this->getOption('context'),
+      $locale ?? $this->getOption('langcode'),
+    );
+  }
+
+}