code: private String[] getSuccessAnnouncementSegments() {
          String value = Optional.fromNullable(getParameter(SignalParameters.SUCCESS_ANNOUNCEMENT.symbol())).or("");
          return value.isEmpty() ? new String[0] : value.split(",");
      }
docs: Played when all data entry attempts have succeeded.
  <p>
  Consists of one or more audio segments. No default.
  </p>
  
  @return The array of audio prompts. Array will be empty if none is specified.