{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "title": "OneOrMany<int32, PreferOne>",
  "anyOf": [
    {
      "type": "integer",
      "format": "int32"
    },
    {
      "type": "array",
      "items": {
        "type": "integer",
        "format": "int32"
      }
    }
  ]
}