+ *
+ * @return true if there are columns marked
+ */
+ public boolean hasSelectedColumns()
+ {
+ return (selected != null && selected.size() > 0);
+ }
+
+ /**
+ *
+ * @return true if there are columns hidden
+ */
+ public boolean hasHiddenColumns()
+ {
+ return hiddenColumns != null && hiddenColumns.size() > 0;
+ }
+
+ /**