import NSG:merge_vcfs
function test_jun_9_2021()
    gz = ["dat/mvcf/HD.vcf.gz",
          "dat/mvcf/v1.vcf.gz",
          "dat/mvcf/v2.vcf.gz",
          "dat/mvcf/v3.vcf.gz",
          "dat/mvcf/v4ref.vcf.gz"]
    merge_vcfs("dat/mvcf/tt", gz...)
end
