code: public PropertyOwner retrieveUserProperties(String strRegistrationKey)
      {
          if (this.getTask() != null)
              return this.getTask().retrieveUserProperties(strRegistrationKey);
          return null;    // Not found
      }
docs: Retrieve/Create a user properties record with this lookup key.
  @param strPropertyCode The key I'm looking up.
  @return The UserProperties for this registration key.