def METHOD_NAME(self, seq):
    """Function passed to `CallbackBlock`, which
        checks sequence after accumulate"""
    tensor = seq.header['_tensor']
    self.assertEqual(tensor['shape'], self.shape_settings)
    self.assertEqual(tensor['dtype'], 'u8')
    self.assertEqual(tensor['labels'], ['time', 'pol', 'freq'])
    self.assertEqual(tensor['units'], ['s', None, 'MHz'])