no message

src/_VisualDVM/TestingSystem/Common/Group/UI/GroupsForm.java

@@ -20,6 +20,9 @@ public class GroupsForm extends DataSetControlForm<Group> {
     public static boolean filterMyOnly = false;
     public GroupsForm(DataSet<?, Group> dataSource_in, JPanel mountPanel_in) {
         super(dataSource_in, mountPanel_in);
+    }
+    @Override
+    protected void createColumns() {
         AddColumns(
                 new ColumnInfo<Group>("имя") {
                     @Override

src/_VisualDVM/TestingSystem/Common/Test/UI/TestsForm.java

@@ -13,6 +13,9 @@ import javax.swing.*;
 public class TestsForm extends DataSetControlForm<Test> {
     public TestsForm(DataSet<?, Test> dataSource_in, JPanel mountPanel_in) {
         super(dataSource_in, mountPanel_in);
+    }
+    @Override
+    protected void createColumns() {
         AddColumns(
                 new ColumnInfo<Test>("имя") {
                     @Override