docs: def _add_genotype_calls(self, variant_obj, variant_line, case_obj):
          """Add the genotype calls for the variant
  
          Args:
              variant_obj (puzzle.models.Variant)
              variant_dict (dict): A variant dictionary
              case_obj (puzzle.models.Case)
  
          """
          variant_line = variant_line.split('\t')
          #if there is gt calls we have no individuals to add
          if len(variant_line) > 8:
              gt_format = variant_line[8].split(':')
              for individual in case_obj.individuals:
                  sample_id = individual.ind_id
                  index = individual.ind_index
  
                  gt_call = variant_line[9+index].split(':')
  
                  raw_call = dict(zip(gt_format, gt_call))
  
                  genotype = Genotype(**raw_call)
  
                  variant_obj.add_individual(puzzle_genotype(
                      sample_id = sample_id,
                      genotype = genotype.genotype,
                      case_id = case_obj.name,
                      phenotype = individual.phenotype,
                      ref_depth = genotype.ref_depth,
                      alt_depth = genotype.alt_depth,
                      genotype_quality = genotype.genotype_quality,
                      depth = genotype.depth_of_coverage,
                      supporting_evidence = genotype.supporting_evidence,
                      pe_support = genotype.pe_support,
                      sr_support = genotype.sr_support,
                  ))