Traits use private instead of protected so they can be used/reused in base classes

modules/backend/traits/ViewMaker.php

@@ -24,12 +24,12 @@ trait ViewMaker
     /**
      * @var string Specifies a path to the views directory.
      */
-    protected $viewPath;
+    private $viewPath;
 
     /**
      * @var string Specifies a path to the layout directory.
      */
-    protected $layoutPath;
+    private $layoutPath;
 
     /**
      * @var string Layout to use for the view.

modules/system/traits/AssetMaker.php

@@ -21,7 +21,7 @@ trait AssetMaker
     /**
      * @var array Collection of assets to display in the layout.
      */
-    protected $assets = ['js'=>[], 'css'=>[], 'rss'=>[]];
+    private $assets = ['js'=>[], 'css'=>[], 'rss'=>[]];
 
     /**
      * @var string Specifies a path to the asset directory.

modules/system/traits/ConfigMaker.php

@@ -22,7 +22,7 @@ trait ConfigMaker
     /**
      * @var string Specifies a path to the config directory.
      */
-    protected $configPath;
+    private $configPath;
 
     /**
      * Reads the contents of the supplied file and applies it to this object.

modules/system/traits/PropertyContainer.php

@@ -15,7 +15,7 @@ trait PropertyContainer
     /**
      * @var array Contains the object property values.
      */
-    protected $properties = [];
+    private $properties = [];
 
     /**
      * Validates the properties against the defined properties of the class.