diff --git a/core/lib/Drupal/Core/Plugin/PluginBase.php b/core/lib/Drupal/Core/Plugin/PluginBase.php
new file mode 100644
index 0000000..03f952a
--- /dev/null
+++ b/core/lib/Drupal/Core/Plugin/PluginBase.php
@@ -0,0 +1,61 @@
+<?php
+
+/**
+ * @file
+ * Contains \Drupal\Core\Plugin\PluginBase
+ */
+
+namespace Drupal\Core\Plugin;
+
+use Drupal\Component\Plugin\PluginBase as ComponentPluginBase;
+use Drupal\Core\StringTranslation\TranslationInterface;
+
+/**
+ * Base class for plugins supporting metadata inspection and translation.
+ */
+abstract class PluginBase extends ComponentPluginBase {
+
+  /**
+   * The translation manager service.
+   *
+   * @var \Drupal\Core\StringTranslation\TranslationInterface
+   */
+  protected $translationManager;
+
+  /**
+   * Translates a string to the current language or to a given language.
+   *
+   * See the t() documentation for details.
+   */
+  protected function t($string, array $args = array(), array $options = array()) {
+    return $this->translationManager()->translate($string, $args, $options);
+  }
+
+  /**
+   * Gets the translation manager.
+   *
+   * @return \Drupal\Core\StringTranslation\TranslationInterface
+   *   The translation manager.
+   */
+  protected function translationManager() {
+    if (!$this->translationManager) {
+      $this->translationManager = \Drupal::getContainer()->get('string_translation');
+    }
+    return $this->translationManager;
+  }
+
+  /**
+   * Sets the translation manager for this plugin.
+   *
+   * @param \Drupal\Core\StringTranslation\TranslationInterface $translation_manager
+   *   The translation manager.
+   *
+   * @return self
+   *   The plugin object.
+   */
+  public function setTranslationManager(TranslationInterface $translation_manager) {
+    $this->translationManager = $translation_manager;
+    return $this;
+  }
+
+}
diff --git a/core/modules/block/lib/Drupal/block/BlockBase.php b/core/modules/block/lib/Drupal/block/BlockBase.php
index 3ed2f6f..9d4f8dd 100644
--- a/core/modules/block/lib/Drupal/block/BlockBase.php
+++ b/core/modules/block/lib/Drupal/block/BlockBase.php
@@ -7,7 +7,7 @@
 
 namespace Drupal\block;
 
-use Drupal\Component\Plugin\PluginBase;
+use Drupal\Core\Plugin\PluginBase;
 use Drupal\block\BlockInterface;
 use Drupal\Component\Utility\Unicode;
 use Drupal\Core\Language\Language;
@@ -100,14 +100,14 @@ public function buildConfigurationForm(array $form, array &$form_state) {
 
     $form['label'] = array(
       '#type' => 'textfield',
-      '#title' => t('Title'),
+      '#title' => $this->t('Title'),
       '#maxlength' => 255,
       '#default_value' => !empty($this->configuration['label']) ? $this->configuration['label'] : $definition['admin_label'],
       '#required' => TRUE,
     );
     $form['label_display'] = array(
       '#type' => 'checkbox',
-      '#title' => t('Display title'),
+      '#title' => $this->t('Display title'),
       '#default_value' => $this->configuration['label_display'] == BlockInterface::BLOCK_LABEL_VISIBLE,
       '#return_value' => BlockInterface::BLOCK_LABEL_VISIBLE,
     );