code: @Override
      public void clearData() {
          synchronized (lock) {
              model.clearData();
              tableRows.clear();
              tableRows.put(TOTAL_ROW_LABEL, new SamplingStatCalculator(
                      TOTAL_ROW_LABEL));
              model.addRow(tableRows.get(TOTAL_ROW_LABEL));
          }
      }
docs: Clears this visualizer and its model, and forces a repaint of the table.