code: def get_genotype_calls_combinations(allele_frequencies):
      """
      given a list of allele frequencies,
      return all possible genotype call combinations
      for example, if len(allele_frequencies) = 6, one combination may be [0,5]
      """
      genotypes = [i for i in range(len(allele_frequencies))]
      genotype_combinations = list(
          itertools.product(genotypes, genotypes)
      )
      genotype_calls = [[i[0], i[1]] for i in genotype_combinations]
      return genotype_calls
  
label_desc: Use image node_id 4 for calling a global function with example usage: get_genotype_calls_combinations(allele_frequencies) and returns: genotype_calls