process
fun processIdenticalLengthStrings(refString: String, altString: String, startPos: Int, chrom: String, refseq: Map<String, NucSeq>, assemblyChrom: String, asmStartPos: Int, asmStrand: String): List<AssemblyVariantInfo>
Function to convert a multi-bp substitution into a series of SNPs. This allows the GVCF to pass a vcf-validator.