groups-list.json

{
  "$schema": "http://json-schema.org/draft-04/schema#",
  "type": "array",
  "items": {
    "allOf":[{"ref":"../definitions/group.json#/definitions/group-output"}],
    "required": [
           "roles",
           "created",
           "modified",
           "_id"
         ]
  }
}