code: @Override
      public void onItemClick(int row, int column) {
          EditItemDialog.newInstance(
                  row,
                  column,
                  mCsvFileDataSource.getColumnHeaderData(column),
                  mCsvFileDataSource.getItemData(row, column))
                  .show(getChildFragmentManager(), EditItemDialog.class.getSimpleName());
      }
docs: ------------------------------------- adapter callbacks --------------------------------------