code: void switchTwoColumnHeaders(int columnIndex, int columnToIndex) {
          Object cellData = getColumnHeaders()[columnToIndex];
          getColumnHeaders()[columnToIndex] = getColumnHeaders()[columnIndex];
          getColumnHeaders()[columnIndex] = cellData;
      }
docs: Switch 2 columns headers with data
  
  @param columnIndex   column header from
  @param columnToIndex column header to