def make_simple_merged_vcf_with_no_combinations(self, ref_seq):
        '''Does a simple merging of all variants in this cluster.
        Assumes one ALT in each variant. Uses the ALT for each
        variant, making one new vcf_record that has all the variants
        put together'''
        if len(self) <= 1:
            return

        merged_vcf_record = self.vcf_records[0]

        for i in range(1, len(self.vcf_records), 1):
            if self.vcf_records[i].intersects(merged_vcf_record):
                return
            else:
                merged_vcf_record = merged_vcf_record.merge(self.vcf_records[i], ref_seq)

        self.vcf_records = [merged_vcf_record]