code: def test_concordance_n_discordant_1(self):
      dataset = get_dataset()
      _, cols_conc, _ = hl.concordance(dataset, dataset)
      assert (
          cols_conc.aggregate(
              hl.agg.count_where(cols_conc.n_discordant != 0)
          )
          == 0
      )
  
imports: import unittest
  import hail
  import hail.expr.aggregators
  from hail.utils.misc import new_temp_file
  from ..helpers import *
  from hail.methods.qc import VEPConfigGRCh37Version85, VEPConfigGRCh38Version95
label_desc: Use image node_id 7 for calling the Tests obj's underlying member method code with example usage: obj.test_concordance_n_discordant_1() without return types