code: @Override
      public Map<String, Object> constructTimeframeArgs() {
          Map<String, Object> timeframe = new HashMap<String, Object>(3);
  
          if (null != this.relativeTimeframe) {
              timeframe.put(KeenQueryConstants.TIMEFRAME, this.relativeTimeframe);
          }
  
          if (null != this.timezone) {
              timeframe.put(KeenQueryConstants.TIMEZONE, this.timezone);
          }
  
          return timeframe;
      }
docs: Construct the Timeframe map to send in the query.
  
  @return  the Timeframe Json map to send in the query.