code: private String[] getRepromptSegments() {
          String segments = Optional.fromNullable(getParameter(SignalParameters.REPROMPT.symbol())).or("");
          return segments.isEmpty() ? getInitialPromptSegments() : segments.split(",");
      }
docs: Played after the user has made an error such as entering an invalid digit pattern or not speaking.
  <p>
  Consists of one or more audio segments. <b>Defaults to the Initial Prompt.</b>
  </p>
  
  @return The array of audio prompts. Array will be empty if none is specified.