def METHOD_NAME(self):
    collation = BasicFieldCollation(
        [
            _make_field(lbyr=2013, lbyrd=2000, data=0),
            _make_field(lbyr=2013, lbyrd=2001, data=1),
            _make_field(lbyr=2013, lbyrd=2002, data=2),
            _make_field(lbyr=2014, lbyrd=2000, data=3),
            _make_field(lbyr=2014, lbyrd=2001, data=4),
            _make_field(lbyr=2014, lbyrd=2002, data=5),
        ]
    )
    result = collation.data[:, :, 0, 0]
    expected = [[0, 1, 2], [3, 4, 5]]
    self.assertArrayEqual(result, expected)