Add doxymentation

Author: m-kuhn

python/gui/editorwidgets/core/qgssearchwidgetwrapper.sip

@@ -206,7 +206,11 @@ class QgsSearchWidgetWrapper : QgsWidgetWrapper
 
   protected slots:
 
-    virtual void setExpression( const QString &value ) = 0;
+    virtual void setExpression( const QString &expression ) = 0;
+%Docstring
+ Set the ``expression`` which is currently used as filter for this widget.
+%End
+
     virtual void setFeature( const QgsFeature &feature );
 
 

src/gui/editorwidgets/core/qgssearchwidgetwrapper.h

@@ -225,7 +225,11 @@ class GUI_EXPORT QgsSearchWidgetWrapper : public QgsWidgetWrapper
 
   protected slots:
 
-    virtual void setExpression( const QString &value ) = 0;
+    /**
+     * Set the \a expression which is currently used as filter for this widget.
+     */
+    virtual void setExpression( const QString &expression ) = 0;
+
     void setFeature( const QgsFeature &feature ) override;
 
   protected: