code: def ref_string_matches_dict_of_ref_sequences(self, ref_sequences):
          '''Returns true iff there is a sequence called self.CHROM in the
          dict of ref_sequences, and the REF string matches'''
          return self.CHROM in ref_sequences and self.ref_string_matches_ref_sequence(ref_sequences[self.CHROM]f ref_string_matches_dict_of_ref_sequences(self, ref_sequences):
          '''Returns true iff there is a sequence called self.CHROM in the
          dict of ref_sequences, and the REF string matches'''
          return self.CHROM in ref_sequences and self.ref_string_matches_ref_sequence(ref_sequences[self.CHROM])
docs: Returns true iff there is a sequence called self.CHROM in the
          dict of ref_sequences, and the REF string matches