adding some comments

src/Bundle/ChillMainBundle/Widget/Widgets/WidgetBar.php

@@ -25,6 +25,8 @@ class WidgetBar implements WidgetProviderInterface
     {
         // Process the data for the bar widget
         // In this example, we assume the data is an array of numbers
+        // Here, I think we suppose to make a query to the database to get some number
+        // For now just sending a number
         $barData = $data['bar'];
 
         // Return the widget data as an associative array