public Object getValueAt(int rowIndex, int columnIndex) {
   return Cache.getMessages().get(rowIndex).getAt(columnIndex);
 }
 public void setValueAt(Object element, int rowIndex, int columnIndex) {
   Cache.getMessages().get(rowIndex).setAt(columnIndex, element);
 }
 public int getRowCount() {
   return Cache.getMessages().size();
 }