code: public String buildRangeString() {
  
          String fromString = BoxDateFormat.format(this.from);
          String toString = BoxDateFormat.format(this.to);
  
  
          String rangeString = String.format("%s,%s", fromString, toString);
          if (rangeString == ",") {
              rangeString = null;
          }
          return rangeString;
      }
docs: Used to build out a string a http box api friendly range string.
  @return String that is uses as a rest parameter.