DataCell { public static DataCell createDataCell(final DataRow row, final String col) { return (row == null) ? null : new DataCell(row, col); } DataCell(final DataRow row, final String columnName); static DataCell createDataCell(final DataRow row, final String col); @Override String toString(); boolean equalTo(final DataCell cell2);  }
@Test public void createDataCellOfNullRowShouldReturnNull() { assertNull(DataCell.createDataCell(null, "n")); }