def verifySOTsegment(self, actual, expected):
self.assertEqual(actual.isot, expected.isot)<EOL>self.assertEqual(actual.psot, expected.psot)<EOL>self.assertEqual(actual.tpsot, expected.tpsot)<EOL>self.assertEqual(actual.tnsot, expected.tnsot)<EOL>
verify the fields of a SOT (start of tile) segment