Add function to check data

Views/View.php

@@ -104,6 +104,20 @@ class View extends ViewAbstract
         $this->l11n        = $response !== null ? $response->getHeader()->getL11n() : new Localization();
     }
 
+    /**
+     * Check if data exists
+     *
+     * @param string $id Data Id
+     *
+     * @return bool
+     *
+     * @since 1.0.0
+     */
+    public function hasData(string $id) : bool
+    {
+        return isset($this->data[$id]);
+    }
+
     /**
      * Get data attached to view
      *