code: def deduplicate_haplotypes(haplotypes_to_genotypes_dict):
      """Returns a new dictionary with deduplicated value.
  
      Type description:
        Genotype = Tuple[int, int]
        Genotypes = List[Genotype]
        Haplotypes = FrozenSet[str]
  
      The type of the input `haplotypes_to_genotypes_dict` is:
        Dict[Haplotypes, List[Genotypes]]
  
      whereas the return type of deduplicate_haplotypes (this function) is:
  
      Dict[Haplotypes, Genotypes].
  
      This function goes through the values in `haplotypes_to_genotypes_dict` and
      keeps only a single example of Genotypes if there are multiple elements of
      the list that have the same haplotypes. Duplicates are expected
      in the list because different genotype configurations can sometimes produce
      the same set of haplotypes, and analyzing a dict of possible
      haplotypes/genotypes combinations with duplicates is much harder and less
      efficient than the deduplicated dict.
  
      Args:
        haplotypes_to_genotypes_dict: Dict[Haplotypes, List[Genotypes]].
  
      Returns:
        Dict[Haplotypes, Genotypes].
      """
      retval = {}
      for haplotypes, genotypes in haplotypes_to_genotypes_dict.items():
          # Keep the last element in the dedup process. The reason is for the
          # behavior to be the same as the previous implementation using list.
          retval[haplotypes] = genotypes[-1]
      return retval
  
imports: import collections
  import copy
  import enum
  import heapq
  import itertools
  from absl import logging
  from deepvariant.labeler import variant_labeler
  from deepvariant.protos import deepvariant_pb2
  from third_party.nucleus.io import fasta
  from third_party.nucleus.util import ranges
  from third_party.nucleus.util import variant_utils
  from third_party.nucleus.util import variantcall_utils
label_desc: Use image node_id 11 for calling a global function with example usage: deduplicate_haplotypes(haplotypes_to_genotypes_dict) and returns: retval