Implement ::getSearchColumns()

refs #8241

modules/monitoring/library/Monitoring/DataView/DataView.php

@@ -378,6 +378,16 @@ abstract class DataView implements QueryInterface, IteratorAggregate
         return $this;
     }
 
+    /**
+     * Get the view's search columns
+     *
+     * @return string[]
+     */
+    public function getSearchColumns()
+    {
+        return array();
+    }
+
     /**
      * @deprecated(EL): Only use DataView::applyFilter() for applying filter because all other functions are missing
      * column validation.