Initial Drupal 11 with DDEV setup

vendor/chi-teck/drupal-code-generator/templates/_plugin-manager/attribute/model.services.yml.twig

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+services:
+  plugin.manager.{{ plugin_type }}:
+    class: Drupal\{{ machine_name }}\{{ class_prefix }}PluginManager
+    parent: default_plugin_manager

vendor/chi-teck/drupal-code-generator/templates/_plugin-manager/attribute/src/Attribute/Example.php.twig

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+<?php
+
+declare(strict_types=1);
+
+namespace Drupal\{{ machine_name }}\Attribute;
+
+use Drupal\Component\Plugin\Attribute\AttributeBase;
+use Drupal\Core\StringTranslation\TranslatableMarkup;
+
+/**
+ * The {{ plugin_type }} attribute.
+ */
+#[\Attribute(\Attribute::TARGET_CLASS)]
+final class {{ class_prefix }} extends AttributeBase {
+
+  /**
+   * Constructs a new {{ class_prefix }} instance.
+   *
+   * @param string $id
+   *   The plugin ID. There are some implementation bugs that make the plugin
+   *   available only if the ID follows a specific pattern. It must be either
+   *   identical to group or prefixed with the group. E.g. if the group is "foo"
+   *   the ID must be either "foo" or "foo:bar".
+   * @param \Drupal\Core\StringTranslation\TranslatableMarkup|null $label
+   *   (optional) The human-readable name of the plugin.
+   * @param \Drupal\Core\StringTranslation\TranslatableMarkup|null $description
+   *   (optional) A brief description of the plugin.
+   * @param class-string|null $deriver
+   *   (optional) The deriver class.
+   */
+  public function __construct(
+    public readonly string $id,
+    public readonly ?TranslatableMarkup $label,
+    public readonly ?TranslatableMarkup $description = NULL,
+    public readonly ?string $deriver = NULL,
+  ) {}
+
+}

vendor/chi-teck/drupal-code-generator/templates/_plugin-manager/attribute/src/ExampleInterface.php.twig

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+<?php
+
+declare(strict_types=1);
+
+namespace Drupal\{{ machine_name }};
+
+/**
+ * Interface for {{ plugin_type }} plugins.
+ */
+interface {{ class_prefix }}Interface {
+
+  /**
+   * Returns the translated plugin label.
+   */
+  public function label(): string;
+
+}

vendor/chi-teck/drupal-code-generator/templates/_plugin-manager/attribute/src/ExamplePluginBase.php.twig

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+<?php
+
+declare(strict_types=1);
+
+namespace Drupal\{{ machine_name }};
+
+use Drupal\Component\Plugin\PluginBase;
+
+/**
+ * Base class for {{ plugin_type }} plugins.
+ */
+abstract class {{ class_prefix }}PluginBase extends PluginBase implements {{ class_prefix }}Interface {
+
+  /**
+   * {@inheritdoc}
+   */
+  public function label(): string {
+    // Cast the label to a string since it is a TranslatableMarkup object.
+    return (string) $this->pluginDefinition['label'];
+  }
+
+}

vendor/chi-teck/drupal-code-generator/templates/_plugin-manager/attribute/src/ExamplePluginManager.php.twig

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+<?php
+
+declare(strict_types=1);
+
+namespace Drupal\{{ machine_name }};
+
+{% apply sort_namespaces %}
+use Drupal\Core\Cache\CacheBackendInterface;
+use Drupal\Core\Extension\ModuleHandlerInterface;
+use Drupal\Core\Plugin\DefaultPluginManager;
+use Drupal\{{ machine_name }}\Attribute\{{ class_prefix }};
+{% endapply %}
+
+/**
+ * {{ class_prefix }} plugin manager.
+ */
+final class {{ class_prefix }}PluginManager extends DefaultPluginManager {
+
+  /**
+   * Constructs the object.
+   */
+  public function __construct(\Traversable $namespaces, CacheBackendInterface $cache_backend, ModuleHandlerInterface $module_handler) {
+    parent::__construct('Plugin/{{ class_prefix }}', $namespaces, $module_handler, {{ class_prefix }}Interface::class, {{ class_prefix }}::class);
+    $this->alterInfo('{{ plugin_type }}_info');
+    $this->setCacheBackend($cache_backend, '{{ plugin_type }}_plugins');
+  }
+
+}

vendor/chi-teck/drupal-code-generator/templates/_plugin-manager/attribute/src/Plugin/Example/Foo.php.twig

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+<?php
+
+declare(strict_types=1);
+
+namespace Drupal\{{ machine_name }}\Plugin\{{ class_prefix }};
+
+{% apply sort_namespaces %}
+use Drupal\Core\StringTranslation\TranslatableMarkup;
+use Drupal\{{ machine_name }}\Attribute\{{ class_prefix }};
+use Drupal\{{ machine_name }}\{{ class_prefix }}PluginBase;
+{% endapply %}
+
+/**
+ * Plugin implementation of the {{ plugin_type }}.
+ */
+#[{{ class_prefix }}(
+  id: 'foo',
+  label: new TranslatableMarkup('Foo'),
+  description: new TranslatableMarkup('Foo description.'),
+)]
+final class Foo extends {{ class_prefix }}PluginBase {
+
+}