diff --git a/python/gui/symbology-ng/qgsrendererv2widget.sip b/python/gui/symbology-ng/qgsrendererv2widget.sip
index f56cc3f9d64..858f5b75c28 100644
--- a/python/gui/symbology-ng/qgsrendererv2widget.sip
+++ b/python/gui/symbology-ng/qgsrendererv2widget.sip
@@ -39,6 +39,12 @@ class QgsRendererV2Widget : QWidget
      */
     void applyChanges();
 
+    /** Shows a panel widget inside the renderer widget.
+     * @param container widget panel to show
+     * @note added in QGIS 2.16
+     */
+    void showPanel( QWidget *container );
+
   signals:
     /**
      * Emitted when expression context variables on the associated
diff --git a/src/gui/layertree/qgslayertreeembeddedwidgetsimpl.cpp b/src/gui/layertree/qgslayertreeembeddedwidgetsimpl.cpp
index b1d069010db..cdd74689c9b 100644
--- a/src/gui/layertree/qgslayertreeembeddedwidgetsimpl.cpp
+++ b/src/gui/layertree/qgslayertreeembeddedwidgetsimpl.cpp
@@ -25,7 +25,7 @@
 #include "qgsvectorlayer.h"
 
 
-
+///@cond PRIVATE
 
 QgsLayerTreeTransparencyWidget::QgsLayerTreeTransparencyWidget( QgsMapLayer* layer )
     : mLayer( layer )
@@ -120,3 +120,5 @@ bool QgsLayerTreeTransparencyWidget::Provider::supportsLayer( QgsMapLayer* layer
 {
   return layer->type() == QgsMapLayer::VectorLayer || layer->type() == QgsMapLayer::RasterLayer;
 }
+
+///@endcond
diff --git a/src/gui/symbology-ng/qgsrendererv2widget.h b/src/gui/symbology-ng/qgsrendererv2widget.h
index 7506df285ef..04518b5baa7 100644
--- a/src/gui/symbology-ng/qgsrendererv2widget.h
+++ b/src/gui/symbology-ng/qgsrendererv2widget.h
@@ -76,6 +76,10 @@ class GUI_EXPORT QgsRendererV2Widget : public QStackedWidget
      */
     void applyChanges();
 
+    /** Shows a panel widget inside the renderer widget.
+     * @param container widget panel to show
+     * @note added in QGIS 2.16
+     */
     void showPanel( QWidget *container );
 
   signals: