code: def test_trio_matrix_incomplete_trios(self):
      ped = hl.Pedigree.read(resource("triomatrix.fam"))
      mt = hl.import_vcf(resource("triomatrix.vcf"))
      hl.trio_matrix(mt, ped, complete_trios=False)
  
imports: import unittest
  import hail
  from ..helpers import *
label_desc: Use image node_id 4 for calling the Tests obj's underlying member method code with example usage: obj.test_trio_matrix_incomplete_trios() without return types