framework/resources/Datasources/json_kvgenflatten/flatten-empty.json

{
  "id":1,
  "evnts":[
    {},
    {"key":null}
  ]
}
{
  "id":2,
  "evnts":[]
}
{
  "id":3,
  "evnts":[
    {},
    {"k1":{"k2":{}}}
  ]
}
{
  "id":2,
  "evnts":[{}]
}