code: def increase_frequency(self, frequency=None):
          
          if frequency is None:
              javabridge.call(self.jobject, "increaseFrequency", "()V")
          else:
              javabridge.call(self.jobject, "increaseFrequency", "(I)V", frequency)
docs: Increases the frequency.
  
          :param frequency: the frequency to increase by, 1 if None
          :type frequency: int