code: public SearchSmsResponse searchMessages(Date date, String to) throws IOException, NexmoClientException {
          return this.searchMessages(new SmsDateSearchRequest(date, to));
      }
docs: Search for completed SMS transactions by date and recipient MSISDN.
  
  @param date the date of the SMS message to be looked up
  @param to   the MSISDN number of the SMS recipient
  
  @return SMS data matching the provided criteria