code: def addClassBreak(self, classMinValue, classMaxValue, label, description, symbol):
          
          if self._classBreakInfos is None:
              self._classBreakInfos = []
          self._classBreakInfos.append(
              {
                  "classMinValue" : classMinValue,
                  "classMaxValue" : classMaxValue,
                  "label" : label,
                  "description" : description,
                  "symbol" :  symbol
              }
          )
docs: adds a classification break value to the renderer