application/org.openjdk.jmc.ui/src/main/java/org/openjdk/jmc/ui/column/ColumnManager.java

@@ -353,11 +353,11 @@
 
         public ColumnViewer getViewer() {
                 return viewer;
         }
 
-        void setColumnHidden(String columnId, boolean hidden) {
+        public void setColumnHidden(String columnId, boolean hidden) {
                 updateColumnOrder();
                 ColumnEntry columnEntry = getColumnEntry(columnId);
                 columnEntry.hidden = hidden;
                 if (hidden) {
                         columnEntry.doHide();