diff --git a/core/lib/Drupal/Component/Plugin/PluginBase.php b/core/lib/Drupal/Component/Plugin/PluginBase.php
index 1372e48..3407845 100644
--- a/core/lib/Drupal/Component/Plugin/PluginBase.php
+++ b/core/lib/Drupal/Component/Plugin/PluginBase.php
@@ -56,7 +56,10 @@ public function getPluginId() {
   }
 
   /**
-   * {@inheritdoc}
+   * Returns the base_plugin_id of the plugin instance.
+   *
+   * @return string
+   *   The base_plugin_id of the plugin instance.
    */
   public function getBasePluginId() {
     if (strpos($this->pluginId, ':')) {
@@ -67,7 +70,10 @@ public function getBasePluginId() {
   }
 
   /**
-   * {@inheritdoc}
+   * Returns the derivative_id of the plugin instance.
+   *
+   * @return string|NULL
+   *   The derivative_id of the plugin instance NULL otherwise.
    */
   public function getDerivativeId() {
     if (strpos($this->pluginId, ':')) {
diff --git a/core/lib/Drupal/Component/Plugin/PluginInspectionInterface.php b/core/lib/Drupal/Component/Plugin/PluginInspectionInterface.php
index 270b009..42eb4b9 100644
--- a/core/lib/Drupal/Component/Plugin/PluginInspectionInterface.php
+++ b/core/lib/Drupal/Component/Plugin/PluginInspectionInterface.php
@@ -23,22 +23,6 @@
   public function getPluginId();
 
   /**
-   * Returns the base_plugin_id of the plugin instance.
-   *
-   * @return string
-   *   The base_plugin_id of the plugin instance.
-   */
-  public function getBasePluginId();
-
-  /**
-   * Returns the derivative_id of the plugin instance.
-   *
-   * @return string|NULL
-   *   The derivative_id of the plugin instance NULL otherwise.
-   */
-  public function getDerivativeId();
-
-  /**
    * Returns the definition of the plugin implementation.
    *
    * @return array