function setHashKey(obj, h) {
  if (h) {
    obj.$$hashKey = h;
  } else {
    delete obj.$$hashKey;
  }
}
The software constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component.