seed.gm

{
  "name": "epoch_row",
  "base": "",
  "fields": [
    {
      "name": "epoch",
      "type": "uint64"
    },
    {
      "name": "start",
      "type": "time_point"
    },
    {
      "name": "end",
      "type": "time_point"
    }
  ]
}