code: private String[] getNoDigitsRepromptSegments() {
          String segments = Optional.fromNullable(getParameter(SignalParameters.NO_DIGITS_REPROMPT.symbol())).or("");
          return segments.isEmpty() ? getRepromptSegments() : segments.split(",");
      }
docs: Played after the user has failed to enter a valid digit pattern during a PlayCollect event.
  <p>
  Consists of one or more audio segments. <b>Defaults to the Reprompt.</b>
  </p>
  
  @return The array of audio prompts. Array will be empty if none is specified.