{
  "type": "object",
  "properties": {
    "label_id": {
      "$ref": "common.json#/non_empty_string",
      "$description": "translations.json#/div_input_validators_label_id"
    },
    "allow_empty": {
      "$ref": "common.json#/boolean_int",
      "default_value": "false",
      "$description": "translations.json#/div_input_validators_allow_empty"
    },
    "variable": {
      "$ref": "div-variable-name.json",
      "$description": "translations.json#/div_input_validators_variable"
    }
  }
}