Assert.assertEquals(project.rows.get(0).cells.size(), 4);
Assert.assertEquals(project.rows.get(5).cells.size(), 5);
Assert.assertEquals(columnGroup.subgroups.size(), 1);
Assert.assertEquals(columnGroup.name, "");
ImportColumnGroup book = columnGroup.subgroups.get("book");
Assert.assertNotNull(book);
Assert.assertEquals(book.columns.size(), 1);
Assert.assertEquals(book.subgroups.size(), 4);
Assert.assertNotNull(book.subgroups.get("author"));
Assert.assertEquals(book.subgroups.get("author").columns.size(), 1);