code: def test_mendel_errors_3(self):
      mt = hl.import_vcf(resource("mendel.vcf"))
      ped = hl.Pedigree.read(resource("mendel.fam"))
      men, fam, ind, var = hl.mendel_errors(mt["GT"], ped)
  
      assert fam.count() == 2
  
imports: import unittest
  import hail
  from ..helpers import *
label_desc: Use image node_id 7 for calling the Tests obj's underlying member method code with example usage: obj.test_mendel_errors_3() without return types