code: def unphase_all_genotypes(variant):
      """Sorts genotype and removes phasing bit of all calls in variant.
  
      This mutation is done in place rather than returning a different copy.
  
      Args:
        variant: nucleus.genomics.v1.Variant.
  
      Returns:
        The variant with unphased calls.
      """
      for c in variant.calls:
          c.is_phased = False
          c.genotype.sort()
      return variant
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import collections
  import enum
  import itertools
  import six
  from third_party.nucleus.protos import variants_pb2
  from third_party.nucleus.util import ranges
  from third_party.nucleus.util import variantcall_utils
  from third_party.nucleus.util import vcf_constants
label_desc: Use image node_id 31 for calling a global function with example usage: unphase_all_genotypes(variant) and returns: variant