[
  {
    "desc": "short deletion",
    "chrom": "chr",
    "start": 41,
    "end": 80
  },
  {
    "desc": "short swap",
    "chrom": "chr",
    "start": 41,
    "end": 80,
    "ins": "TTTTTTTT"
  },
  {
    "desc": "long deletion",
    "chrom": "chr",
    "start": 41,
    "end": 110,
    "flank": 30
  },
  {
    "desc": "long swap",
    "chrom": "chr",
    "start": 41,
    "end": 110,
    "ins": "TTTTTTTT",
    "flank": 30
  },
  {
    "desc": "ins",
    "chrom": "chr",
    "start": 41,
    "end": 40,
    "ins": "TTTTTTTT"
  }
]