diff --git a/core/modules/views/src/Plugin/views/cache/CachePluginBase.php b/core/modules/views/src/Plugin/views/cache/CachePluginBase.php
index 14df452a22c44cea9c77b8472f07130a731d5ded..929ecac2bd91c0a4650e34fd98343cd9ec639e34 100644
--- a/core/modules/views/src/Plugin/views/cache/CachePluginBase.php
+++ b/core/modules/views/src/Plugin/views/cache/CachePluginBase.php
@@ -97,6 +97,9 @@ protected function cacheSetMaxAge($type) {
    * Save data to the cache.
    *
    * A plugin should override this to provide specialized caching behavior.
+   *
+   * @param $type
+   *   The cache type, either 'query', 'result'.
    */
   public function cacheSet($type) {
     switch ($type) {
@@ -119,6 +122,12 @@ public function cacheSet($type) {
    * Retrieve data from the cache.
    *
    * A plugin should override this to provide specialized caching behavior.
+   *
+   * @param $type
+   *   The cache type, either 'query', 'result'.
+   *
+   * @return bool
+   *   TRUE if data has been taken from the cache, otherwise FALSE.
    */
   public function cacheGet($type) {
     $cutoff = $this->cacheExpire($type);