3514046: TypeError, getSetMapping return value must be of type bool, array returned

Closes #3514046

TypeError: Drupal\quicktabs\Plugin\views\style\Quicktabs::getSetMapping(): Return value must be of type bool, array returned in Drupal\quicktabs\Plugin\views\style\Quicktabs->getSetMapping() (line 99 of modules/contrib/quicktabs/src/Plugin/views/style/Quicktabs.php).

src/Plugin/views/style/Quicktabs.php

@@ -95,7 +95,7 @@ class Quicktabs extends StylePluginBase {
   /**
    * Get the set mapping.
    */
-  public function getSetMapping(): bool {
+  public function getSetMapping(): array {
     return $this->setMapping;
   }