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diff --git a/web/core/lib/Drupal/Core/Plugin/Context/ContextHandlerInterface.php b/web/core/lib/Drupal/Core/Plugin/Context/ContextHandlerInterface.php
index a0d570360..d524dcf22 100644
--- a/web/core/lib/Drupal/Core/Plugin/Context/ContextHandlerInterface.php
+++ b/web/core/lib/Drupal/Core/Plugin/Context/ContextHandlerInterface.php
@@ -74,6 +74,9 @@ interface ContextHandlerInterface {
    *
    * @throws \Drupal\Component\Plugin\Exception\ContextException
    *   Thrown when a context assignment was not satisfied.
+   * @throws \Drupal\Component\Plugin\Exception\MissingValueContextException
+   *   Thrown when a context is provided but has no value. Only thrown if
+   *   no contexts are missing.
    */
   public function applyContextMapping(ContextAwarePluginInterface $plugin, $contexts, $mappings = []);